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Chocolate Peanut Butter Cookie Bars

Sharing some cookie bars today that will have you celebrating! These Gooey Chocolate Peanut Butter Cookie Bars are great to take to parties and so simple to prepare, you’re in for a treat!!
cookie bars

Cookie Bars

Oh how I love chocolate and peanut butter together. My cookie bars are perfect for taking to potlucks or any party! I’ve combined my peanut butter cookie dough from last week with a cake mix I turned into the chocolate cookie layer and topped it with marshmallows and chocolate chips. I’m in love with these bars!

Try my Fruity Pebbles Cookie Bars too! Follow Picky Palate on Instagram for daily recipe inspiration.

Simple and delicious, hope you enjoy!

cookie bars

Press your peanut butter cookie dough layer into the bottom of a 9 x 13 inch baking dish. I used half of the dough. Use any peanut butter cookie dough recipe you’d like. I just had some leftover dough from last week and it worked great!!

cookie bars

I took a devil’s food cake mix and combined it with 1 stick softened unsalted butter and one egg. Give it a good stir and it will have a cookie dough consistency.

cookie bars

Press the chocolate layer over the peanut butter cookie layer.

cookie bars

Top with mini marshmallows.

cookie bars

Chocolate chips up next!! Bake for about 35-40 minutes.

cookie bars

Let them cool and cut into gorgeous squares. Lovely!!! Hope you enjoy.

cookie bars

Peanut Butter Desserts

Gooey Chocolate Peanut Butter Cookie Bars
Prep Time
10 mins
Cook Time
40 mins
Total Time
50 mins
Course: Dessert
Cuisine: American
Keyword: chocolate peanut butter, chocolate peanut butter dessert, cookie bar recipe, cookie bars, cookie recipes, easy peanut butter cookies, peanut butter cookie bars, peanut butter cookie recipe, peanut butter cookies
Servings: 12
Calories: 261 kcal
Author: Jenny
  • 1/2 amount peanut butter cookie dough recipe
  • 1 box Devil’s Food Cake Mix
  • 1 stick unsalted butter softened
  • 1 large egg
  • 2 cups mini marshmallows
  • 1 cup milk chocolate chips
  1. Preheat oven to 350 degrees F. and line 9 x 13 inch baking dish with parchment paper.
  2. Press peanut butter cookie dough layer into baking dish. I used THIS recipe. Use whatever peanut butter cookie dough recipe you’d like. Place cake mix, butter and egg into a large bowl. Mix until dough consistency forms. Press over peanut butter cookie layer. Top with marshmallows and chocolate chips. Bake for 35-40 minutes until baked through. Let cool completely then cut into bars and serve room temperature.
Nutrition Facts
Gooey Chocolate Peanut Butter Cookie Bars
Amount Per Serving
Calories 261 Calories from Fat 81
% Daily Value*
Fat 9g14%
Saturated Fat 3g19%
Cholesterol 16mg5%
Sodium 319mg14%
Potassium 123mg4%
Carbohydrates 43g14%
Fiber 1g4%
Sugar 27g30%
Protein 3g6%
Vitamin A 55IU1%
Vitamin C 0.1mg0%
Calcium 73mg7%
Iron 1.9mg11%
* Percent Daily Values are based on a 2000 calorie diet.

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15 Responses | Comments RSS

  1. 1

    It’s ridiculous how easy to awesomeness is!

  2. 2
    Liz S. says:

    LOVE love love this treat recipe!

  3. 3

    Just saw these in my email. Oh my goodness Jenny. I could eat these for breakfast this morning!

  4. 4

    THOSE LAYERS!! Gorgeous. I’ll take a dozen, please 🙂

  5. 5

    Oh these are my kind of treat!

  6. 6

    I would gladly take a few of these to get me through this Monday!

  7. 7

    Love everything about these! I would love an entire pan 🙂

  8. 8
  9. 9
    Rachel says:

    Oh my goodness I am seriously going to have to make these today! Wow!

    Simply Rachel Nicole

  10. 10
    Maria says:

    Im drooling over here!

  11. 11

    Oh man these look so good and so simple!

  12. 12

    I made this for dessert yesterday and it was very good. I did add some peanut butter and butter scotch chips just because I had them.

  13. 13
    Gaby Dalkin says:

    I’m all for a loaded bar treat!! YUM!

  14. 14
    Caitlin says:

    Looks delicious! The combination of all those ingredients looks absolutely sinful (in the very best possible way)!

    xx, Caitlin

  15. 15

    How gooey and delicious! Peanut butter and chocolate are the best!

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Jenny Flake

Welcome to Picky Palate, my online kitchen! You'll usually find me with a cookie in one hand and a salad in the other. It's all about the balance :) The recipes you'll see are my creations. The Picky Palate Cookbook is now available. Enjoy!