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Chocolate Brownie Bundt Cake is a rich, decadent, chocolate dessert that is so simple to make with a chocolate cake mix + a brownie mix! Topped with a silky smooth chocolate ganache topping and easy chocolate curls made with a milk chocolate candy bar. This bundt cake is sure to impress and no one will ever know that it took just minutes to prepare. 

A chocolate Bundt Cake with a cake mix and a brownie mix sitting on a white plate.

Chocolate Brownie Bundt Cake Recipe

If you need a really easy dessert recipe that is sure to impress, then you’ve found it with this Chocolate Brownie Bundt Cake. So simple to make with a chocolate cake mix and a brownie mix, plus some added ingredients for tons of moisture and rich chocolate flavor. 

It’s like a cross between a really rich chocolate cake + homemade brownies. You are going to want to make this one!

A serving spoon with a slice of Bundt Cake on it and glazed in ganache.

Ingredients Needed

  • Chocolate Brownie Bundt Cake

    • Milk Chocolate Brownie Mix – Do not prepare according to package directions. For this recipe we only want the dry brownie mix. 
    • Chocolate Fudge Cake Mix – Only the dry cake mix is used in this recipe. 
    • Large Eggs
    • Water
    • Canola or Vegetable Oil – These are the preferred oils but any neutral flavored oil can work well in this recipe. 
    • Full-Fat Sour Cream
    • Mini Semi-Sweet Chocolate Chips

Ingredients for this chocolate Bundt Cake with each one labeled in text with what it is.

  • Ganache

    • Heavy Cream – No substitutes!
    • Semi-Sweet Chocolate Chips – Can also use milk chocolate chips for a sweeter ganache or dark chocolate chips if wanted. 
    • Chocolate Bar – This is for the chocolate curls on top of the cake and it’s totally optional. 

Ingredients for chocolate ganache

How To Make a Brownie Bundt Cake with Chocolate Cake Mix & Brownie Mix

Learn how to make this easy chocolate brownie bundt cake with the easy steps below. Be sure and read to the bottom of the page where there is a printable recipe card, a pin it button so you can save this dessert recipe for later, and a recipe card with all the details and tips for success. 

  • Preparation : Heat the oven to 350 degrees F. Spray a 12-cup bundt pan generously with cooking spray or baking spray (cooking spray + flour). Set aside for later. 
  • Chocolate Cake Mix + Brownie Mix : Dump the dry contents of the cake mix and brownie mix into a large mixing bowl. Stir it well with a wire whisk to break up any clumps. 
  • Bundt Cake Ingredients : Add the eggs, water, oil, and sour cream. Beat on medium speed, increasing speed as needed, for 2 minutes or until it’s mixed well. Scrape the side and bottom of the bowl if needed to ensure that no dry mix is sticking to the bottom of the bowl. 
  • Chocolate Chips : Stir in the bag of chocolate chips. 
  • Bake : Pour the batter into the prepare bundt pan and bake for 45-55 minutes. A toothpick inserted into the top of the Bundt Cake should come out clean or with moist crumbs on it. 
  • Cool : Let the cake cool inside the pan for 5 minutes. Invert it onto a serving plate or cooling rack. Let it cool completely before making the ganache and glazing the cake. 
  • Ganache : Make the ganache and pour it over the cake. It’s best to do this with the cake on a cooling rack and then set the cooling rack inside a cookie sheet. 

How to make this Bundt Cake with chocolate cake mix and brownie mix with step by step photos.

How to make this Bundt Cake with chocolate cake mix and brownie mix with step by step photos.

How to make this Bundt Cake with chocolate cake mix and brownie mix with step by step photos.

How to make this Bundt Cake with chocolate cake mix and brownie mix with step by step photos.

How to make this Bundt Cake with chocolate cake mix and brownie mix with step by step photos.

How to make this Bundt Cake with chocolate cake mix and brownie mix with step by step photos.

Chocolate Brownie Bundt Cake FAQ’s

  • How To Store Leftovers

    • Store any leftovers at room temperature, covered in foil or plastic wrap, or you can leave it in a cake stand, for up to 3-4 days. 
    • Leftovers can also be stored in the fridge if preferred. 
  • Can I Freeze Chocolate Brownie Bundt Cake?

    • Yes you can with a couple modifications. Do not freeze the Bundt Cake with the chocolate ganache on top. Prepare the cake as directed, bake it, and then let it cool completely to room temperate. Invert the cake and wrap it up in foil. I prefer to do a double layer of foil. Freeze for up to 2 months. 
    • When ready to thaw and eat let it thaw in the fridge overnight. Make the ganache as directed and glaze the cake. Serve!
  • Variation & Substitution Ideas

    • Make it Lighter : Try using Greek Yogurt in place of the sour cream for reduced calories and fat. You can also substitute unsweetened applesauce for half of the oil. I do not recommend using all applesauce as that will make the cake really spongey and dense. I have never made these lighter replacements so experiment if you want to. 
    • Chocolate Cake Mix : Although I prefer the chocolate fudge cake mix you can use any chocolate cake mix you want. Milk chocolate, devil’s food cake mix, etc. 
    • Brownie Mix : Again, I recommend the milk chocolate brownie mix but any can be used. Try dark chocolate brownie mix or chocolate fudge brownie mix. 
  • Can I Make It Ahead of Time?

    • Yes, you can prepare the chocolate brownie Bundt Cake ahead of time and let it sit at room temperature, covered, for up to 24 hours in advance. 
    • I would recommend making the ganache right before serving. 
    • Leftovers, with the ganache on, store well at room temperature or in the fridge, but eventually they will make the cake soften up a bit. For best results, glaze with the ganache right before serving if you are making it ahead of time. 

Pouring ganache over this chocolate Bundt Cake.

Side view of a cake with ganache on top.

Recipe Tips

Here are a few of my helpful tips so that you can have success recreating this chocolate bundt cake in your own kitchen ♥

  • Spray Bundt Pan Well : To avoid having pieces of the Bundt Cake stick to the pan (when you invert it) make sure you spray the pan well with cooking spray. You can also use baking spray which is cooking spray + flour.
  • Use The Correct Size Bundt Pan : You need a 12-cup bundt pan for this recipe. Anything smaller and the batter will spill over during the bake time. 
  • Full Fat Dairy : When baking, for best results, make sure that you are always using full-fat dairy products. This recipe only calls for sour cream. The lite dairy products contain more watery which makes them not taste as rich and thick. 

Fork inside this Bundt Cake on a white plate.

More Chocolate Recipes You’ll Love

  • Chocolate Chip Brownies – Thick, soft-baked, semi cake-like brownies made with simple ingredients. Loaded with milk chocolate chips! Eat as a brownie or make brownie ice cream sundaes with them. 
  • No Bake Chocolate Cream Pie – Easy to make, no bake pie, made with chocolate pudding and whipped with Cool Whip.
  • M&M Chocolate Cookies – Chocolate cookie base filled with colorful m&m candies.
  • Skinny Chocolate Cake – You won’t believe how delicious this cake tastes! Greek yogurt + a cake mix is topped with lite Cool Whip and sugar-free pudding whipped until fluffy. 
  • Chocolate Chip Zucchini Muffins – Double chocolate with cocoa powder and mini chocolate chips. You won’t even know that they have 2 cups of vegetables!
A chocolate Bundt Cake with a cake mix and a brownie mix sitting on a white plate.
Together As Family Logo

Chocolate Brownie Bundt Cake


Author Jessica - Together as Family
Course Cake, Dessert
Cuisine American
Prep Time 5 minutes
Cook Time 50 minutes
Cooling Time 1 hour
Total Time 1 hour 55 minutes
Servings 12
Chocolate Brownie Bundt Cake is a rich, decadent, chocolate dessert that is so simple to make with a chocolate cake mix + a brownie mix! Topped with a silky smooth chocolate ganache topping and easy chocolate curls made with a milk chocolate candy bar.

Ingredients
  

Chocolate Brownie Bundt Cake

  • 1 box (18.4 oz) milk chocolate brownie mix
  • 1 box (15.25 oz) chocolate fudge cake mix
  • 4 large eggs
  • cups water
  • 1 cup canola or vegetable oil
  • 1/4 cup full-fat sour cream
  • 1 bag (10 oz) mini semi-sweet chocolate chips

Ganache

  • 1 cup heavy cream
  • 1 cup semi-sweet chocolate chips
  • Hershey's milk chocolate bar (optional for the chocolate curls)

Instructions

  • Preheat the oven to 350° F. Generously spray a 12-cup bundt pan with cooking spray. Set aside for later.
  • In a large mixing bowl add the dry brownie mix and dry cake mix. Stir with a wire whisk to break up any clumps.
    How to make this Bundt Cake with chocolate cake mix and brownie mix with step by step photos.
  • Add the eggs, water, oil, and sour cream.
    Using an electric handheld blender, mix on medium speed, increasing speed as needed, until it's combined well. About 2 minutes.
  • Stir in the mini chocolate chips with a spatula or a wooden spoon.
    How to make this Bundt Cake with chocolate cake mix and brownie mix with step by step photos.
  • Pour the batter into the prepared bundt pan.
  • Bake for 45-55 minutes or until a toothpick inserted into the cake comes out clean or with moist crumbs on it.
    How to make this Bundt Cake with chocolate cake mix and brownie mix with step by step photos.
  • Let the cake cool inside the bundt pan for 5 minutes. Invert the Bundt Cake onto a cooling rack. Let it cool completely.

Ganache

  • Once the cake is cooled completely make the ganache.
  • Add the semi-sweet chocolate chips to a heat safe mixing bowl (like a glass bowl).
  • In a small saucepan, over medium low heat, add the heavy cream. Bring it to a simmer which is when bubbles are just starting to form along the edges. Remove from the heat and immediately pour it over the semi-sweet chocolate chips in the bowl.
    How to make this Bundt Cake with chocolate cake mix and brownie mix with step by step photos.
  • Let it sit for 3 minutes and then stir with a wire whisk until it's completely combined and smooth.
    How to make this Bundt Cake with chocolate cake mix and brownie mix with step by step photos.
  • Using a spoon, or you can also just pour it, drizzle the ganache over the Bundt Cake.
    * I recommend putting the Bundt Cake on a cooling rack and then placing the cooling rack over a cookie sheet. This will catch all the leftovers and not make a mess of it on the counter.
    * If you want the ganache thicker let it sit, once it's mixed well, for a few minutes to thicken slightly before glazing the cake with it.
    How to make this Bundt Cake with chocolate cake mix and brownie mix with step by step photos.
  • If you want the chocolate curls, allow the ganache to cool slightly before doing them. Use a vegetable peeler to peel along the longer side of the chocolate bar. Allow the chocolate curls to fall on top of the ganache.

Notes

Tip : Do not prepare the brownie mix or chocolate cake mix according to box instructions! Just dump the dry contents from the box into the bowl and follow the directions above as listed. 
Powdered Sugar : If wanted, instead of using ganache on top you can dust it with powdered sugar. If doing this, I would recommend dusting it with powdered sugar after you invert it onto the cooling rack and then again once it's cooled slightly. If using powdered sugar you can serve this cake warmed instead of letting it cool completely. 

Nutrition

Calories: 865kcal | Carbohydrates: 85g | Protein: 10g | Fat: 56g | Saturated Fat: 20g | Polyunsaturated Fat: 14g | Monounsaturated Fat: 17g | Trans Fat: 0.2g | Cholesterol: 90mg | Sodium: 460mg | Potassium: 419mg | Fiber: 4g | Sugar: 53g | Vitamin A: 435IU | Vitamin C: 0.2mg | Calcium: 110mg | Iron: 6mg

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