Print
These triple peanut butter monster cookies are a peanut butter lovers dream! Thick, chewy, soft monster cookies loaded with peanut butter, oats, peanut butter chips, and reeses pieces. These are insanely delicious & addicting. A tall glass of cold milk is a must have.

Triple Peanut Butter Monster Cookies

These triple peanut butter monster cookies are a peanut butter lovers dream! Thick, chewy, soft cookies loaded with peanut butter, oats, peanut butter chips, and reeses pieces. A tall glass of cold milk is a must have.
Course Dessert
Cuisine American
Prep Time 10 minutes
Cook Time 10 minutes
Total Time 20 minutes
Servings 12 large cookies
Calories 390 kcal

Ingredients

  • 1/2 cup butter, softened 1 stick
  • 1 cup brown sugar
  • 1/2 cup creamy peanut butter
  • 1 large egg
  • 2 teaspoons vanilla extract
  • 3/4 cup flour
  • 1 teaspoon baking soda
  • 1 teaspoon cornstarch
  • 1/4 teaspoon baking powder
  • 1/8 teaspoon a pinch of salt
  • 1 1/2 cups old-fashioned oats quick or regular, I use some of each
  • 1 cup peanut butter chips
  • 1/2 cup reeses pieces

Instructions

  1. Preheat oven to 350 degrees and line baking sheets with parchment paper or a silpat.
  2. In a large bowl, cream together the butter, brown sugar, and peanut butter with a hand or stand mixer until light in color and fluffy, about 3-4 minutes. Mix in the egg and vanilla, scraping down the sides of the bowl as needed.
  3. Add the flour, baking soda, cornstarch, baking powder, salt, oats and stir by hand to combine all together.
  4. Stir in peanut butter chips and reeses pieces.
  5. Use a 1/4 cup measurer to measure out the cookies. Roll into a ball and place them on the baking sheet. Gently press down dough balls to form a very thick, cookie shape. They will not spread much while baking.
  6. Bake the cookies for 10-12 minutes until the edges are just starting to brown and the top still looks slightly undercooked.
  7. Remove from the oven and cool for 10 minutes on the baking sheet before moving them to a wire rack to cool completely.
  8. If wanted, press a few additional Reese's Pieces and/or peanut butter chips onto the tops of the cookies. This makes them look pretty!

Recipe Notes

If you use unsalted butter you might want to increase the salt to 1/4 teaspoon.

You can find the baking Reese's Pieces in the baking aisle. They are mini size. Or, just use the regular sized Reese's Pieces. I've used both kinds and I prefer the miniature Reese's Pieces.