This post may contain affiliate links that won’t change your price but will share some commission.

Made with a cake mix short-cut, Chocolate Peanut Butter Bars is an easy crumb bar dessert recipe with a creamy peanut butter and chocolate mixture sandwiched between a cake mix base and topping.

This dessert snack is ooey, gooey, decadent, and incredibly simple to make.

Chocolate Peanut Butter Bars.

Chocolate Peanut Butter Bars

Something magical happens when you mix peanut butter and chocolate together. Combine that with just enough crunch and these Chocolate Peanut Butter Bars are drool-worthy, crave-worthy, and completely addictive!

Please tell me if you can eat just! I can’t.

Just look at that thick ribbon of chocolate. And, the crust is buttery with a little crunch and texture.

Stack of 3 chocolate bars on a saucer.
Chocolate Peanut Butter Bars recipe

If you’ve been following me, you know I’m all about quick and easy! Using a cake mix for the crust and topping makes the prep time for these bars very quick. Furthermore, the hardest part is waiting for them to cook.

If you want really pretty squares, you’ll need to wait until they cool completely or even chill them in the refrigerator to get those perfect, bakery-style cuts. However, if that isn’t a priority to you, dive right in as soon as they’re cool enough to handle!

Stack of 2 chocolate bars on a saucer.

How to Make Peanut Butter Bars with Cake Mix

jar of peanut butter, stick of butter, chocolate chips, and cake mix on a countertop
  1. Gather your ingredients. This easy peanut butter bars recipe starts with a chocolate cake mix! If you want to use a vanilla cake mix, that will work as well.
  2. Melt butter and combine with the cake mix.
adding melted butter to peanut butter bars batter
  1. Add peanut butter. Any creamy, non-stir variety is best.
adding peanut butter to a mixing bowl with cake mix.
  1. Add the eggs. Crack the eggs into a bowl before adding them to the batter. This way, if you have broken egg shells, they won’t end up in the batter.
adding ingredients to a mixing bowl.
making chocolate peanut butter bars in a mixing bowl.
  1. Melt the chocolate. I usually microwave the chocolate chips in 30 second bursts at high power, stirring in between each burst.
  2. Add sweetened condensed milk and stir.
cake batter in a mixing bowl.
  1. Bake! Pour batter over the crust mixture in the pan, add the topping, and bake in a preheated 350° oven.
unbaked chocolate peanut butter bars in a baking pan.
scoops of peanut butter on chocolate cake batter in a baking pan.
Stack of two chocolate bars on a saucer.

Other Dessert Bars to Make

Stack of 3 chocolate bars on a saucer.
Stack of 3 chocolate bars on a saucer.

Chocolate Peanut Butter Bars

Made with a cake mix short-cut, Chocolate Peanut Butter Bars is an easy crumb bar dessert recipe with a creamy peanut butter and chocolate mixture sandwiched between a cake mix base and topping.
Author: Paula
5 from 13 votes
Print Pin Rate

Want to save recipes? Create an account or login & then you can use the “Save Recipe” button when viewing a recipe to save it to your Recipe Box. You can access your saved recipes on any device and generate a shopping list for recipes in your collections.

Save To Your Recipe Box
Prep Time: 20 minutes
Cook Time: 20 minutes
Total Time: 40 minutes
Servings: 12 slices
Join Misfits Market now to start saving on groceries!


  • 15.25 -ounce package yellow cake mix
  • 6 Tablespoons butter melted
  • 1/2 cup crunchy peanut butter
  • 2 large eggs
  • 12 ounce pkg semi-sweet chocolate chips
  • 14 ounce can sweetened condensed milk
  • 2 Tablespoons butter
  • 2 teaspoon vanilla


  • Preheat oven to 325 degrees.
  •  Combine cake mix, butter, peanut butter, and eggs in a large bowl. Press into a 9×13 cake pan reserving 1 cup to crumble on top. 
  • In a small saucepan, melt chocolate chips, sweetened condensed milk, and butter. Stir until smooth, remove from heat and stir in vanilla. Pour over cake mixture in pan. Spread evenly. Crumble remaining cake mixture over top. 
  • Bake 20-25 minutes. Remove from oven and cool completely before cutting into bars.


Calories: 547kcal | Carbohydrates: 65g | Protein: 9g | Fat: 28g | Saturated Fat: 15g | Cholesterol: 64mg | Sodium: 438mg | Potassium: 392mg | Fiber: 4g | Sugar: 45g | Vitamin A: 381IU | Vitamin C: 1mg | Calcium: 199mg | Iron: 3mg
Tried this recipe?Please take a moment to comment letting me know how you liked it & consider giving it a 5 star rating. I love hearing from you!
Do you have questions about saving recipes to your Recipe Box?Visit Recipe Box FAQ!


  1. 5 stars
    Chocolate peanut butter bars recipe is a brilliant idea! My kids loved the complimenting flavor of chocolate and peanut butter. They even requested more!

  2. 5 stars
    What a classic, winning combination! This is one of those fantastic treats that is easy to make but wows everyone who tries them.

  3. 5 stars
    Rich, chocolate decadence! I love the almost cookie-like crust the cake mix creates. Thanks so much for sharing the recipe!

  4. 5 stars
    Delicious! I like recipes that start with a cake mix because I am all about shortcuts.

  5. 5 stars
    I love the chocolate and peanut butter combination! One of my all time favorites. These are putting me in the frame of mind to think about holiday cookie trays!

Leave a Reply

Your email address will not be published. Required fields are marked *

Your email address will not be published. Have you tried this recipe? Consider giving it 5 stars!