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HomeMealtimeRecipesCookies

Delicious Cake Mix Cookie Bars

4.21 from 63 votes
Angela SellariBy Angela Sellari
Angela Sellari
Angela Sellari Founder of AboutAMom

Angela is the founder of About A Mom and currently acts as a content creator and editor-in-chief for the About A Mom Team. She has been a professional blogger for over 10 years. Angela has appeared…

Expertise: Content Creation & Editing View all posts →
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With just a few ingredients you can have a delicious cake or ooey gooey cookies, like these Chocolate-Peanut Butter Cake-Mix Cookie Bars. This cake-mix cookie-bar recipe is pure decadence and incredibly simple to make!

These Chocolate-Peanut Butter Cake Mix Cookie Bars are oh-so decadent and incredibly simple to make!

I love all of the different things you can do with a basic yellow cake mix. You can easily make cookie bars with cake mix. With just a few ingredients you can have a delicious cake or ooey gooey cookies, like these Chocolate-Peanut Butter Cake Mix Cookie Bars.

I’m all about easy recipes with few ingredients. This Chocolate-Peanut Butter Cake Mix Cookie Bars recipe is one of my absolute favorites. If you LOVE that combination of peanut butter and chocolate, you’ll definitely want to check out these recipes for Decadent Dark Chocolate Brownies with Fluffy Peanut Butter Frosting, No Bake Chocolate Peanut Butter Mini Cakes and Chocolate Peanut Butter Banana Breakfast Shakes.

Why You Will Love This Recipe

  • You can make it with only a few easy-to-find ingredients.
  • Chocolate and peanut butter are a classic combo.
  • You’ll be amazed at what you can do with just your basic yellow cake mix
  • They can be served warm and gooey or cold and dense. They taste just as good either way.
Chocolate Peanut Butter Cake Mix Cookie Bars

Variations

This recipe lends itself well to the bulk section of your grocery store. One reader added M&Ms to the bottom layer of the cake. I have yet to try this but it sounds amazing (and crunchy!). And while I sing the praises of the yellow cake mix, you can replace it with other cake mixes, such as chocolate, devil’s food, or even a flavored cake mix like peanut butter or chocolate fudge. Depending on just how much you love chocolate and peanut butter, you may want to adjust the amount of both if you go with flavored mixes. If you would like a slightly healthier option, use all-natural peanut butter.

Can I use crunchy peanut butter?

Yes. In fact, that’s what I used. Totally delicious and provides an enticing texture change.

How to Store Leftover Cake-Mix Cookie Bars

These cookie bars will stay soft and chewy, even after they cool. Just make sure that you store them cooled in an airtight container or wrap them individually in plastic or aluminum. If you plan on eating them in a couple of days, store the cookies in a cool, dry place, like a cupboard or pantry. You can refrigerate them to keep them fresh for a few days longer. You can also freeze the cookies. Store them as you would above (you can also place the wrapped cookies inside an airtight container for double the protection) then place them in the freezer, where they should last for up to 3 months. To thaw, move them from the freezer to the fridge, keep them there overnight.

Chocolate Peanut Butter Cake Mix Cookie Bars

Delicious Cake Mix Cookie Bars

Angela Sellari
It is so easy to make cookie bars with cake mix. These Chocolate-Peanut Butter Cake Mix Cookie Bars are oh-so decadent and incredibly simple to make!
4.21 from 63 votes
Print Recipe Pin Recipe
Prep Time 5 minutes mins
Cook Time 20 minutes mins
Course Dessert
Cuisine American
Servings 16 bars
Calories 433 kcal

Ingredients
  

  • 1 package plain yellow cake mix
  • 1/2 cup butter melted
  • 1 cup creamy peanut butter
  • 2 eggs
  • 1 12 ounces package semi-sweet chocolate chips
  • 1 14 ounces can sweetened condensed milk
  • 2 tablespoons butter
  • 2 teaspoons vanilla

Instructions
 

  • Preheat oven to 325°F. Set aside an ungreased 9"x13" metal pan.
  • Stir and combine cake mix, melted butter, peanut butter, and eggs in a large bowl using an electric mixer or a wooden spoon. The batter will be thick. Press this into the pan, reserving 1 1/2 cup of the mixture to crumble on top.
  • In a small pot, melt chocolate chips, sweetened condensed milk, and butter. Remove from heat and stir in the vanilla.
  • Spread chocolate mixture over the cookie crust in the pan, and then crumble the 1 1/2 cups of reserved cake mixture on top evenly.
  • Bake for 20-25 minutes. Cool completely before cutting into bars.
  • These cookie bars are amazing when eaten warm, but are just as good cooled. Serve with a tall glass of milk, and enjoy. You know you want one!

Notes

  • You could, though I recommend sticking with what the recipe calls for. Doing so delivers the sweetness and texture you’ll enjoy. Evaporated or fat-free milk is thinner and not as sweet. Healthier? Yep. But not as tasty.
  • For a texture change, use crunchy peanut butter. Totally delicious. In fact, that’s what I used! For a slightly healthier option, use all-natural peanut butter. 

Nutrition

Serving: 1gCalories: 433kcalCarbohydrates: 55gProtein: 9gFat: 20gSaturated Fat: 9gSodium: 356mgFiber: 3g
Keyword cake mix cookie bars
Tried this recipe?Let us know how it was!

About Angela SellariContent Creation & Editing

Angela is the founder of About A Mom and currently acts as a content creator and editor-in-chief for the About A Mom Team. She has been a professional blogger for over 10 years. Angela has appeared in numerous TV segments, advertising campaigns and her work has been featured by many top publications. She lives in Tampa, Florida.

Reader Interactions

Published: May 24, 2023 | Updated: Oct 28, 2025
4.21 from 63 votes (62 ratings without comment)

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Have a question? Use the form below to submit your question or comment. I love hearing from you and seeing what you made!

Recipe Rating




  1. richelle leffler says

    Posted on 3/9 at 4:20 PM

    yummm those look so good going to have to make some looks delicious ty for sharing

    Reply
  2. Margot C says

    Posted on 3/10 at 12:45 PM

    I love recipes that you can put together using cake mix. Sometimes I just don’t want to measure and sift flour!

    Reply
  3. richelle leffler says

    Posted on 3/12 at 4:03 PM

    LOOKS DELICIOUS GOING TO HAVE TO TRY IT OUT

    Reply
  4. Dawn Monroe says

    Posted on 3/12 at 4:38 PM

    Now I know a recipe for when I dont have icing or we dont really want cake. These look amazing!

    Reply
  5. Linda Cassidy says

    Posted on 3/12 at 7:58 PM

    looks delicious, over from the weekend link up

    Reply
  6. Sarah @ Sarah's Bake Studio says

    Posted on 3/14 at 8:36 AM

    I found your Chocolate Peanut Butter Cake Mix Cookie Bars on #FoodieFriDIY and I am so glad that I did because these are to die for. I am seriously drooling. I can’t wait to make these. Pinned! Thanks for sharing!

    Reply
  7. Karly says

    Posted on 3/15 at 10:43 PM

    My favorite combo ever! Thanks for linking up with What’s Cookin’ Wednesday!

    Reply
  8. sheila says

    Posted on 7/8 at 9:20 AM

    Yum! As a mom of 3 Girl Scouts, I can still get you Tagalongs if you want!

    Reply
  9. Tricia says

    Posted on 3/13 at 6:44 PM

    Looks delicious, can’t wait to try these. Heads up that the print friendly button is not print friendly. It printed 20 pages including all of the comments.

    Reply
    • Angela says

      Posted on 3/14 at 9:49 AM

      Ahhh, thanks for letting me know. I’ll see about getting that fixed today.

      Reply
  10. Vanessa says

    Posted on 5/8 at 3:45 PM

    For all those who are saying it looks good, you need to try them! They taste better than they look! Great recipe!

    I made an addition, I added a small bag of M&Ms to the bottom layer. Do freaking yummy!

    Reply
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