Delicious Peanut Butter Chocolate Bars

Peanut Butter Chocolate Bars make the perfect dessert! These cake mix bars come together quickly with yellow cake mix, chocolate chips, and peanut butter to make everyday baking easy and delicious.

If you like peanut butter desserts, try our amazing Peanut Butter Oatmeal Bars and Gluten-Free Peanut Butter Cookies!

Delicious Peanut Butter Chocolate Bars with Yellow Cake Mix

This is one dreamy bar that requires a few simple ingredients you likely have in your pantry. These easy Cake Mix Peanut Butter Chocolate Bars are so tasty; you'll have a hard time sharing and not eating them all yourself!

Do you see that fudgy, irresistible center and crumbly topping?

Who can pass up the combination of PB and chocolate? What could be better? We're not sure there is a more classic dessert flavor combination than chocolate and peanut butter!

You should also try these Peanut Butter Oatmeal Bars drizzled with chocolate!! Not to be outdone by Peanut Butter Saltine Toffee (aka Christmas Crack!!)

Ingredient Notes

For the crust and topping, you'll need:

• Box of Yellow Cake Mix - any brand will do. 
• Butter - salted or unsalted.
• Creamy Peanut Butter - we like natural peanut butter, but you can use your favorite brand.
• Eggs - large, room-temperature eggs.

For the filling, you'll need:

• Chocolate Morsels - we like semi-sweet chocolate chips, but dark chocolate would also be great. 
• Sweetened Condensed Milk - to give the recipe a nice, rich, fudgy flavor
• Butter - salted or unsalted.
• Pure Vanilla Extract - the better quality, the better your result.

Here are the supplies you'll need:

• Mixing bowl
• Mixing spoon or spatula
• 9x13 inch baking pan
• Small pot
• Knife to cut them when they're done baking.

A Peanut Butter Dessert for Christmas

One of our favorite times to bake these bars is during the holidays. They make an excellent addition to a cookie exchange. 

Other favorite holiday treats:

Christmas Crack - the irresistible cracker toffee that's easier than you think to make.
Homemade Almond Roca - a classic recipe you'll use year after year. 
Peppermint Bark - this highly addictive candy is perfect for any holiday celebration. 
Easy Christmas Treats - over 50 treat recipes that will get you in the holiday spirit!
Cranberry Bliss Saltine Toffee - the combination of cranberry bliss and toffee is not to be missed. 

How to Make Chocolate Chip Peanut Butter Bars

Even if you're a novice in the kitchen, you can easily make these peanut butter bars with a cake mix. 

To get started, place your oven rack in the middle position and preheat your oven to 350 degrees F. (177 degrees C.)

STEP 1 - MIX CRUST AND TOPPING INGREDIENTS

Now, in a large mixing bowl, combine yellow cake mix, melted butter, peanut butter, and both eggs in a large bowl, mix until combined.

STEP 2 - PRESS CRUST INTO PAN

Reserving 1½ cups of your mixture to crumble on top, press the cake batter into a 9X13 baking pan.

STEP 3 - MAKE CHOCOLATE FILLING

Next, melt chocolate chips, sweetened condensed milk, and butter together in a small pot over medium to medium-low heat. Remove from heat and stir in the vanilla extract.

STEP 4 - ADD CHOCOLATE FILLING AND TOPPING

Now, spread the chocolate mixture over the batter that's already pressed into the pan, and then crumble the 1½ cups of reserved cake mixture evenly on top.

STEP 5 - BAKE

Finally, bake for 25-30 minutes until golden brown. Take out of the oven and cool completely before cutting into bars.

Erin's Tips & Tricks

• Melting Chocolate: Do not turn the heat in your pot with the chocolate up too high, or the chocolate mixture will burn. 
• Flavor Option: You can add half peanut butter chips and half semi-sweet for a fun twist. 
• Other Add-Ins: You can add nuts, toasted coconut, or butterscotch chips. 
• Storing: You can store your cooked and cooled bars in an airtight container in the fridge for up to a week.

How To Store Your Peanut Butter Chocolate Bar Recipe

You can store your Chocolate Peanut Butter Cake Bars in an airtight container on the counter for about 5 days.

To Freeze:

PB Chocolate Bars freeze well. Place them in a freezer-safe, airtight container, label and date them, and store them in the freezer for up to 3 months. 

To thaw, simply remove the cake mix bars from the freezer and keep them at room temperature. If you want them to have a fresh-baked flavor, you can always rebake them at 250 degrees F. 

Other Chocolate Recipes

If you love baking with chocolate, try some of these recipes.

Dark Chocolate Brownies
No-Bake Chocolate Peanut Butter Cookies
Traditional Chocolate Chip Cookies
Oreo Stuffed Chocolate Chip Cookies

Now, let’s get baking!

If you try our Cake Mix Peanut Butter Bars or any other recipe on Suburban Simplicity, don't forget to rate the recipe and let us know how it went in the comments below, we love hearing from you! Better yet, use the hashtag #suburbansimplicity if you make the recipe.

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Printable Recipe

We originally posted this recipe on November 21, 2016. We updated it with enhanced instructions and images on December 1, 2020. 

Gifting Your Peanut Butter Chocolate Bar Treats

If you'd like to share your peanut butter bars with family and friends, you can use an airtight container or wrap them in cellophane for transport. Tie a cute bow and tag around the top, and you're all set!

It just cannot be denied: peanut butter and chocolate are a match made in heaven! So grab your baking supplies and bake up some dreamy Peanut Butter Chocolate Bars with yellow cake mix today!