brownies & bars

No Flour Monster Cookie Bars

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My most popular recipe! Classic monster cookies loaded with peanut butter, oats, chocolate chips, m&m’s. These no flour monster cookie bars bake in a cookie sheet and are the most delicious cookie bars you’ll ever have. Plus, there is NO FLOUR in these!

No Flour Monster Cookie Bars are loaded with oats, peanut butter, chocolate chips, and m&m's. They bake in a cookie sheet and make enough to feed a crowd. Plus, there is no flour in them!

updated with new video and image April 2018

I first posted these no flour monster cookie bars in August of 2015. Since then they have been viewed over 1 million (and counting…) times on the blog! I remember when I posted these, the first time, I did not think they would be loved by all and the most popular recipe on the blog.

It truly makes me so happy that everyone is loving these bars. I decided, because I feel like I make them all the time anyways, that they deserved a re-do post and new updated pictures.

No Flour Monster Cookie Bars are loaded with oats, peanut butter, chocolate chips, and m&m's. They bake in a cookie sheet and make enough to feed a crowd. Plus, there is no flour in them!

A simple mixture of butter, peanut butter, oats, chocolate chips, and m&m’s. Mixes up in one bowl and then bakes in a cookie sheet, which makes them perfect for a large group.

Or after baking wrap them up individually and freeze them. Eat them cold (really yummy!) or put one in a lunch box and it will be thawed by lunchtime. You can also warm it up in the microwave for 10-15 seconds. Either way, I know you’ll love them. 

No Flour Monster Cookie Bars are loaded with oats, peanut butter, chocolate chips, and m&m's. They bake in a cookie sheet and make enough to feed a crowd. Plus, there is no flour in them!

I have had several readers tell me that they have reduced the sugars, by as much as half, and they still turned out really well. I have personally never done that so I can’t say for sure how the recipe turns out with reduced sugar.

Keep in mind that the recipe makes an entire cookie sheet so 2 cups of sugar is spread out among roughly 30-36 servings.

 Also, substitute in whatever you want. Butterscotch chips, white chocolate chips, peanut butter chips, pecans, etc. Just try to keep at the 2-3 cups of mix-ins.

No Flour Monster Cookie Bars are loaded with oats, peanut butter, chocolate chips, and m&m's. They bake in a cookie sheet and make enough to feed a crowd. Plus, there is no flour in them!

Let me know if you’ve made these and how you like them! The original post has over a hundred comments and they are rave reviews. Thank you to all that have made these, shared these on Facebook, and pinned them to Pinterest ♥ ♥

Thank you for visiting for this recipe. I truly hope you love these as much as my family does. 

Watch the video below to see how to make these bars!

No Flour Monster Cookie Bars
Prep Time
10 mins
Cook Time
17 mins
Total Time
27 mins
 
No Flour Monster Cookie Bars are loaded with oats, peanut butter, chocolate chips, and m&m's! Plus, they have no flour in them and they bake in a cookie sheet so they're perfect for a crowd.
Course: Dessert
Cuisine: American
Servings: 40
Calories: 219 kcal
Ingredients
  • 1/2 cup salted butter, softened 1 stick
  • 1 cup packed brown sugar
  • 1 cup granulated sugar
  • 1 1/2 cups creamy peanut butter
  • 3 large eggs
  • 1 tablespoon vanilla extract
  • 1 1/2 cups quick oats
  • 3 cups old-fashioned oats
  • 1 teaspoon baking soda
  • 1 1/2 cups mini m&m's
  • 1 cup miniature chocolate chips
Instructions
  1. Heat oven to 350 degrees. Prepare a cookie sheet by lining with parchment paper, silpat liner, or spraying with cooking spray.
  2. In a large bowl, or bowl of stand mixer with the paddle attachment, combine butter, brown sugar, granulated sugar, and peanut butter. Mix until fluffy and pale in color. About 1-2 minutes.
  3. Add the eggs and vanilla extract. Mix together.
  4. Add in the oats and baking soda. Mix until combined.
  5. Add in the m&m's and chocolate chips (reserve some for top of bars if wanted). Stir together with a wooden spoon or spatula until combined.
  6. Dump dough onto the cookie sheet and spread out. This will take several minutes, but it can be done. Sprinkle the reserved m&m's and chocolate chips on top (if wanted). Press down slightly into dough.
  7. Bake for 17-20 minutes. The edges will be lightly browned and the middle will still look pale and underdone, but it will finish baking as it cools. Let cool for at least an hour so the bars can firm up and come together. You do not want to over-bake these!
Recipe Notes

Use a pizza cutter to cut these. Makes it so easy. To make spreading the dough in the cookie sheet easier; spray hands with cooking spray and press out, use a spatula to spread, or use the butter wrapper to spread it out in the cookie sheet. The bag (about 10 oz) of mini m&m's comes with about 1 1/2 cups of m&m's inside of it. I just use the whole bag. It's less than the 2 cups called for. So, use 1-2 cups of the m&m's. Whatever you prefer. These need to cool for an hour so they can set and come together. You can eat them warm and gooey, but to make cutting easy and so they'll hold up, let them cool completely. When they come out of the oven they will look gooey but I promise they will come together as they cool.

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No Flour Monster Cookie Bars | Cookie Bars | Monster Cookies | Gluten Free | No Flour | No Flour Monster Cookie Bars are made in a cookie sheet, or sheet pan and they're perfect for a crowd. #dessertrecipes #glutenfreedesserts #easydessertrecipes

No Flour Monster Cookie Bars | Cookie Bars | Monster Cookies | Gluten Free | No Flour | No Flour Monster Cookie Bars are made in a cookie sheet, or sheet pan and they're perfect for a crowd. #dessertrecipes #glutenfreedesserts #easydessertrecipes

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73 Comments

  • Reply
    Lisa
    February 6, 2017 at 10:43 pm There is only one kind of oats that is offered in the stores as certified gluten-free. Does this recipe only work with the two different types or can I use the one type?
    • Reply
      Together As Family
      February 9, 2017 at 9:52 am Hey Lisa. I've had many readers tell me that they use all of one kind of oats and they turn out just fine. Quick oats have a finer, more ground up texture which really gives a nice chewiness to the bars. The regular oats provide a lot of texture. I just really love the combo of both, but you would be fine just using one kind of oats. I hope that helps. Oh, and so sorry my reply is late. I have had some issues with my site lately. Thanks for commenting :)
      • Reply
        Hannah
        April 3, 2017 at 7:49 pm You can make quick oats or oat flour by blitzing regular rolled outs in a food processor, or I use our nutri-ninja. Depending on your preference, you can make them really fine, or have them a bit coarser. It's a much cheaper alternative to buying to types, and you get the different textures while knowing it's definitely gluten free!
        • Reply
          Together As Family
          April 3, 2017 at 8:20 pm Thanks for the tip!
    • Reply
      Linda O'Meara
      May 25, 2017 at 6:11 pm I can't get the GF quick oats either. I think I'll try using 2/3 regular gluten free oats and 1/3 gf oat flour.
      • Reply
        Together As Family
        May 27, 2017 at 9:08 am I have had people who grind up some of the regular old-fashioned oats to make finer oats (like the quick oats). You could try that with the regular gluten-free oats. I would just put it in a blender or food processor/chopper and pulse them a few times until they are more ground up. Not powder! :) Hopefully that works if you can't find the quick oats that are gluten free.
  • Reply
    Janina
    March 24, 2017 at 9:52 am I always use this exact recipe for monster cookies! They're my family's favourite. Pressing the dough into a cookie sheet would definitely save time, I'm excited to try it! We love a mixture of chocolate chips, peanut butter chips & Reese's pieces! I've cut the sugar in half and sometimes substituted a cup of oatmeal for ground flaxseed, works great!
    • Reply
      Together As Family
      March 26, 2017 at 2:24 pm It's the best recipe, huh?! I've used it for years too. I love your idea of all the peanut butter chips and reese's pieces- I'm a peanut butter lover myself so I know your variation would be a hit at my house. The cookie sheet definitely makes it so much easier :)
  • Reply
    Laura
    March 26, 2017 at 1:44 pm What size cookie sheet?
    • Reply
      Together As Family
      March 26, 2017 at 2:21 pm The standard size cookie sheet. Not the huge sheet pans that restaurants use. The standard size is around 12x18".
      • Reply
        Kaitlyn
        October 21, 2018 at 12:54 pm Would I double the recipe for using one of the huge cookie sheets that restaurants use?
        • Reply
          Together As Family
          October 26, 2018 at 1:20 am Possibly? Honestly, I’m not sure of the measurements of one of those huge restaurant cookie sheets so I can’t say for sure.
  • Reply
    Taylah
    March 28, 2017 at 8:33 pm Hi, I'm in Australia, Is the temperature for the oven Fahrenheit or Celsius? I think 350 Celsius is bit high?
    • Reply
      Together As Family
      March 29, 2017 at 10:30 am I am in the U.S so it is Fahrenheit. I didn't even think to include Celsius.... So sorry. I can start adding that now. When I put it into the computer it said it's equal to 176 Celsius. Hopefully that sounds better than the 350. I hope that helps.
  • Reply
    B
    March 30, 2017 at 9:09 pm Ever tried using Peanut Butter alternative like sunflower butter? We have some nut allergies...
    • Reply
      Together As Family
      March 31, 2017 at 7:43 pm I have never personally tried it but I have had several readers comment and tell me that they have used the other butters and it's worked out just fine. I hope that helps!
  • Reply
    Gayle
    April 1, 2017 at 11:11 pm I love sunflower butter...I cant wait to try this.
  • Reply
    Melanie
    April 9, 2017 at 9:06 am These r absolutely delish!! Found these on a Passover board and Only issue is they are not kosher for Passover bc of the oats and baking soda. Oh well. Great recipe for another time!
    • Reply
      Together As Family
      April 13, 2017 at 4:39 pm Thanks!! Oh darn, yea they probably would not work for Passover. But yes any other time :) We love these bars!
  • Reply
    Jane
    May 7, 2017 at 9:42 pm Have these ever been made with the gluten free rolled oats? I have a gluten intolerant person and I'm sure he would love these.
    • Reply
      Together As Family
      May 13, 2017 at 10:18 pm I've been told that gluten free oats work just fine in this recipe. I've never used them but from what I understand the gluten free oats are just like the regular oats (of course without the gluten part :) ).
      • Reply
        Linda O'Meara
        May 25, 2017 at 6:17 pm Oats alone are Gluten Free. It's the mixture of other grains in with them as they grow, and the processing that renders them NOT gluten free. So only oats that say GF on them are ok for people with Celiac Disease.
        • Reply
          Together As Family
          May 27, 2017 at 9:06 am Thank you! I did not know that, so I'm glad you commented because I always have readers asking about the gluten free aspect of these bars.
  • Reply
    Megan @ MegUnprocessed
    May 10, 2017 at 4:43 pm So festive and fun treat!
  • Reply
    Arman @ thebigmansworld
    May 12, 2017 at 2:13 am Seriously making these this weekend!
  • Reply
    Kasey
    May 16, 2017 at 3:11 pm Hello. Do I cook this in a 13 X 9 pan or what?
    • Reply
      Together As Family
      May 18, 2017 at 7:30 pm Yes, you cook them in a cookie sheet with sides. It's a standard cookie sheet, about 12" x 18". I hope that helps :)
  • Reply
    JB
    May 18, 2017 at 5:31 pm I've adjusted this to make lactation cookies and they turn out great! I add in 1/2 cup (lightly heaped) of Brewers yeast and 1/2 cup of ground flax seed. I do not cut back on oatmeal at all for these 2 additions. I also used a combo of white chocolate chips and phone chips instead of mini choc chips, both about 3/4 cup. Awesome!
    • Reply
      Together As Family
      May 18, 2017 at 7:18 pm This is so great to hear. How neat that you were able to make lactation cookies from the recipe. I actually love the idea of adding ground flax seed. Thank you for coming back to leave your comment, I love hearing everyone's variations on these cookie bars :)
      • Reply
        Thetesa
        June 23, 2017 at 4:55 pm This is what I do too!
  • Reply
    Lindsay Lorang
    May 24, 2017 at 4:04 pm I can't believe you can make these amazing treats without flour - as someone trying to decrease gluten in their family's life they are the perfect sweet solution. I made them last week for the first time for a road trip and am making them again this week for Memorial Day camping - thanks for the recipe!!
    • Reply
      Together As Family
      May 27, 2017 at 9:12 am You're welcome. That makes me happy to hear they were a hit. When I make these bars for Holidays I always try and use the festive m&m's. I saw red, white, and blue m&m's in the store and those would be perfect for Memorial Day! The recipe calls for mini m&m's but the regular ones work just fine too. We just love the minis at my house :)
  • Reply
    Rita
    May 25, 2017 at 9:22 am What is the calorie count for these?
  • Reply
    Connie Dueñez
    May 28, 2017 at 9:20 am Omgosh! I am Super excited to have come across this recipe & cannot wait to try it... so many endless possibilities. I want to try mixing in some rainbow sprinkles, mini choco. chips & toffee bits..whoah baby! I look forward to the many more fun recipies you'll be sharing with us. Ive also just startd following you on Facebook :) Yayyy.
    • Reply
      Together As Family
      June 2, 2017 at 10:40 pm Thank you Connie for the facebook follow! I always love having more people follow along. And yes, you're right the additions are endless in these bars. I've even added in some candy bar chunks. I cut up some Reese's and add those or some butterscotch chips are another favorite addition of ours. Enjoy these!
  • Reply
    D levy
    June 7, 2017 at 11:35 am These are awesome! I leave out the M&M's and add dark chocolate chips, walnuts, and dried fruit. Great for breakfast.
    • Reply
      Together As Family
      June 7, 2017 at 1:46 pm What great additions. I've never thought to add walnuts and dried fruit but it sounds amazing. Thank you for your comment and sharing your idea!
  • Reply
    Holly
    June 8, 2017 at 4:24 pm Will honey or maple syrup work as a substitute for the sugar? Anyone ever try that?
    • Reply
      Together As Family
      June 12, 2017 at 12:47 pm I have not done that and have not heard from readers if it's been done. To me, it seems like using honey or maple syrup would make the dough too wet. But I am not for sure on that, it's just a guess. You could always try it and maybe start with 1/2 cup and work from there.
  • Reply
    Cheryl Anderson
    June 11, 2017 at 10:18 pm Made these today for our Sunday family dinner dessert. My kids and grand-children come over for dinner every Sunday. My daughter has Celiac disease, so I am always looking for Gluten Free recipes to try. Yours looked pretty easy to make GF. I used GF instant oats because that is what I had. Otherwise followed the recipe. They were delicious. Everyone loved them. Will definitely make again. Thanks for the great recipe!
    • Reply
      Together As Family
      June 12, 2017 at 12:37 pm So glad your daughter could eat this! And yes, they are easy to make gf with the gf oats. So glad you all enjoyed these :)
  • Reply
    melisa moser
    June 12, 2017 at 2:31 am I use some of the mini Reese's Pieces in with the mini m&m's and chips.
    • Reply
      Together As Family
      June 12, 2017 at 12:36 pm Love this! My kids love those mini reese's pieces.
  • Reply
    Jill
    June 22, 2017 at 3:16 pm Have you ever mixed these up and then frozen them to bake later?
    • Reply
      Together As Family
      June 27, 2017 at 11:56 pm I have not. I've only ever frozen them after baking.
  • Reply
    ReeTa
    June 27, 2017 at 10:48 am I am allergic to any type of nuts... what can be used in place of the peanut butter?
    • Reply
      Together As Family
      June 27, 2017 at 11:55 pm I would suggest substituting it with whatever you normally do. I don't know anything about but allergies and substitutions so I could not say for sure. I know some readers have mentioned using sun butter. You could give that a try 😄.
  • Reply
    Kathy Weber
    July 1, 2017 at 10:15 am Hi, A few questions,,,could you subsitute powdered peanut butter, and could you get away with making the reciepe without eggs? My husband has had a major weight loss over the last year, and while I get he wants to maintain, he's also turned into a calorie nazi if you will- low calorie as possible, no sugar etc. Anyhow, these bars look yummy, we are both intrigued with them being no flour, he says sub truvia/stevia, no eggs and do the powdered peanut butter. I say the eggs are needed to hold stuff together. Look forward to hearing back! Thanks. :) If any other readers have made these with my mentioned ingredients please share! Thanks! :)
    • Reply
      Together As Family
      July 1, 2017 at 6:40 pm Well, first that's awesome he's gone through such a change. Congrats to him. About the peanut butter powder, I am not too familiar with it but I think it would be too dry to add to these bars. The peanut butter kind of acts like butter in this recipe, so if you did not have that and instead had powder, I don't think it would come together at all. That's just my thought but you could always try it and cross your fingers it works :) I know others have reduced the sugar amount by half and still had success with the recipe. As far as the sugar sub of truvia or stevia, I know that they can be used in place of the sugar. I believe the package should tell you what amount of sugar substitute to use for real sugar. As far as eggs, I've seen lots of recipes that use flax egg (?) I think that's what it's called. I know other bloggers use them in their recipes all the time. The one that comes to mind is here : http://beamingbaker.com/gluten-free-vegan-oat-flour-chocolate-chip-cookies-v-gf-dairy-free/ She uses a mixture of flax + water as a substitute for eggs. You could try that. Hopefully that helps a bit. Also, if your husband is looking for healthier treats, the website I linked to above has all kinds of those types of recipes.
      • Reply
        Kathy Weber
        July 2, 2017 at 9:09 am Thanks!
        • Reply
          Together As Family
          July 4, 2017 at 3:00 pm 😁
  • Reply
    Shelbie
    July 18, 2017 at 10:16 pm Just wondering the shelf life of these?? Want to take them camping so I need to make them ahead of time-ish.
    • Reply
      Together As Family
      July 19, 2017 at 12:00 am I always freeze at least half. They freeze perfectly. As far as shelf life, they've only ever lasted about 3-4 days around my house. I would say up to a week? There is no flour in them which helps make it so they don't dry out. I would suggest just freezing them and then taking the bars with you camping straight from the freezer. That's what I would do anyways ☺️ Hopefully that helps. Enjoy!
  • Reply
    Jennifer
    July 28, 2017 at 6:30 pm Just made these today. As others have said, these are so good. And even better, easy to make gluten free. Love that! Thanks so much for such a simple to make recipe! Yum Yum!
    • Reply
      Together As Family
      July 28, 2017 at 7:56 pm So glad you loved them! And yes super easy to make gluten free with the gluten free oats :) Thank you for coming back to let me know!
  • Reply
    Sheila Mehr
    August 20, 2017 at 4:35 pm I love to bake and share my results with my coworkers. Two of them have Celiac disease and I always felt bad that they couldn't eat what I was bringing in. When I found this recipe and read the comments about using GF quick oats I knew I had to give them a try. I only made a half batch and used 2 1/4 c. GF oats. I baked them too long, so ended up cutting off the sides (learned my lesson there) - they were a huge hit! Even the other folks were eating them, along with the PB cookies I brought for everyone else. I'm making them again tonight! Thanks!
    • Reply
      Together As Family
      August 22, 2017 at 11:24 pm I love hearing things like this! SO happy I could help. And yes, these bars are tricky because they will look like they're not done but once they cool and come together they will be perfect. Thanks for letting me know :)
  • Reply
    Tom
    August 25, 2017 at 4:46 pm Made these for myself and my family. Best monster cookie bars ever!! Recipe if perfect just the way it is!! Adding peanuts to it could add some great crunch.
    • Reply
      Together As Family
      August 25, 2017 at 4:51 pm Peanut would be a great addition or even crunchy peanut butter. Yum! Glad to hear these were a hit.
  • Reply
    So Nice I Made It Twice… (Favorite Pinterest Recipes) – Party in my Pantry!
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  • Reply
    sabel
    September 19, 2017 at 9:11 pm I am so happy I found these. I bake alot, and will say these are our new favorite recipe! Very easy and would highly recommend trying them.
    • Reply
      Together As Family
      September 20, 2017 at 10:59 am Thank you SO much! That makes me happy to hear they were a hit. I make lots of different food but these bars are something that we always go back to. Thanks so much for letting me know :)
  • Reply
    23 Easy Gluten-Free Desserts to Wow A Crowd - Ideal Me
    September 26, 2017 at 5:29 am […] Via Together as Family […]
  • Reply
    Wisdom - Black & Gold - THIS BEAUTIFUL EXISTENCE
    October 13, 2017 at 3:34 pm […] with the love of oats that Black Beauty had, and wound my way around Pinterest until I found these monster cookie bars.  Gathering together what I had, they turned out to be s’mores monster cookie bars!  We loved […]
  • Reply
    Tifany
    October 21, 2017 at 6:51 am Freezing and thawing instructions you've found that work best?
    • Reply
      Together As Family
      October 21, 2017 at 9:40 pm There are a few ways. You can eat them right out of the freezer. They're really cold and kind of amazing. Or, take one out of the freezer and leave on the countertop for about 5 minutes or so until it's softened. Or, the last way is to microwave a bar straight from the freezer for about 5-10 seconds. There really is no wrong or right way to do it. I've tried all of the ways mentioned above and love them all :) Enjoy!
  • Reply
    Liv
    December 17, 2017 at 3:18 pm So easy to make and so yummy! That you for sharing this recipe!
    • Reply
      Together As Family
      December 19, 2017 at 12:52 pm You're very welcome! We love this recipe too :) Thanks for coming back to let me know.
  • Reply
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    January 9, 2018 at 11:54 pm […] best one. I have to say I really liked the version posted by togetherasfamily.com for this dessert click here for original recipe. This is a chewy bar with a large amount of peanut butter and an even larger amount of oats. I was […]
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  • Reply
    Christine
    August 2, 2018 at 9:44 am I can't have sugar but I was thinking of trying this and substituting the sugar for honey ( so far many recipes have done well with that) but I wasnt sure as to what I could sub the M&Ms and chocolate chips with .......maybe chopped unsweetened chocolate or nuts ?? Any suggestions?
  • Reply
    Kim Hammen
    August 20, 2018 at 3:44 pm Has anyone else had trouble with the mix overflowing the cookie sheet? I used the size recommended, but it was billowing over one side of my cookie sheet when I opened the over after 20 minutes, and the mix felt pretty gelatinous at that point. I followed the recipe exactly, not sure what happened.
    • Reply
      Together As Family
      August 23, 2018 at 8:02 pm Mine always get puffy and maybe slightly higher than the edges of the pan, but it has never overflowed. That's odd, I am not sure what it is. I use a regular, plain cookie sheet with the rimmed sides.

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