Go Back
+ servings

Peanut Butter Cookie Dough Brownie Bars

Two of my favorite treats are brownies and cookie dough. So I figured… why not put them together? I am so glad I did, these bars are amazing!
Prep Time45 mins
Cook Time15 mins
Total Time1 hr
Course: Dessert
Cuisine: American
Keyword: best brownies, Brownies, Chocolate and peanut butter dessert, cookie dough
Servings: 24
Calories: 401kcal


  • 9x13-inch Baking Pan
  • Electric Mixer
  • Microwave Safe Bowl


  • 19.5 ounces Pillsbury Brownie Mix 1 box
  • cup vegetable oil (as listed on box)
  • ¼ cup water (as listed on box)
  • 2 eggs (as listed on box)
  • 6 Tablespoons peanut butter divided
  • ½ cup peanut butter
  • ¼ cup salted butter softened
  • ½ cup granulated sugar
  • 1 cup brown sugar
  • cup milk
  • 1 Tablespoon vanilla extract
  • 2 cups all purpose flour
  • 2 cups peanut butter M&M's


  • Cook your brownies according to directions on the box for a 9x13-inch pan.
  • Once they are out of the oven, take 3 Tablespoons of peanut butter and gently spread it over your warm brownies. Let them sit and cool.
  • With an electric mixer, cream the butter and 1/2 cup peanut butter until smooth.
  • Add the sugar, brown sugar, milk and vanilla, and mix until smooth. Carefully add the flour, and continue to mix at low speed until fully combined.
  • Spoon the cookie dough onto the cooled brownies and spread gently into an even layer.
  • Sprinkle on all of the M & M's so they are spread out across all the brownies.
  • Melt the last 3 Tablespoons of peanut butter in the microwave (about 30 seconds) and drizzle over your brownies.
  • Cover and place in refrigerator until serving.


Calories: 401kcal | Carbohydrates: 51g | Protein: 7g | Fat: 20g | Saturated Fat: 11g | Trans Fat: 1g | Cholesterol: 19mg | Sodium: 167mg | Potassium: 151mg | Fiber: 1g | Sugar: 34g | Vitamin A: 84IU | Calcium: 31mg | Iron: 2mg