If you’re on the hunt for a dessert that combines creamy peanut butter and rich chocolate into an irresistible treat, look no further! These Peanut Butter Chocolate Bars are a delightful mix of flavors and textures that will leave you craving more. With a simple list of ingredients and an easy step-by-step guide, you can whip up these delicious bars in no time. Perfect for sharing at gatherings, or simply enjoying at home, these bars are sure to become a favorite.
Top Reasons to Make Peanut Butter Chocolate Bars

There are so many reasons to dive into this delectable recipe!
- Quick and Easy: With a handful of ingredients and minimal prep time, these bars are perfect for last-minute baking.
- Universal Appeal: Who doesn’t love the combination of peanut butter and chocolate? This treat is sure to please both kids and adults alike.
- Versatile Treat: These bars can be served as a dessert, a snack, or even a sweet breakfast option with a cup of coffee.
- Make Ahead: They store well, making them ideal for meal prep or to satisfy those late-night cravings.
Gather These Ingredients
Before you start, let’s make sure you have everything you need to create these Peanut Butter Chocolate Bars.
- 1 (15.25 oz) package plain yellow cake mix
- 1/2 cup butter, melted
- 1 cup creamy peanut butter
- 1 egg
- 1 (12 oz) package semi-sweet chocolate chips
- 1 (14 oz) can sweetened condensed milk
- 2 tablespoons butter
- 2 teaspoons vanilla extract
Hardware & Gadgets
You’ll need a few essential tools to make the baking process smooth and enjoyable.
- Mixing Bowls: For combining ingredients.
- Measuring Cups and Spoons: To ensure accurate measurements.
- Baking Pan: An 8×8-inch or 9×9-inch pan works perfectly for this recipe.
- Spatula: To spread the mixture evenly in the pan.
- Whisk or Electric Mixer: To thoroughly mix the batter.
Peanut Butter Chocolate Bars: Step-by-Step Guide

Now, let’s get started on making your Peanut Butter Chocolate Bars!
Step 1: Preheat the Oven
Begin by preheating your oven to 350°F (175°C). This ensures that your bars bake evenly.
Step 2: Mix the Base
In a large mixing bowl, combine the melted butter, peanut butter, and egg. Mix until well combined. Then, add the yellow cake mix and stir until a thick batter forms.
Step 3: Prepare the Pan
Grease your baking pan with a little butter or cooking spray to prevent sticking. Spread half of the batter evenly across the bottom of the pan.
Step 4: Add the Chocolate Layer
In another bowl, mix the semi-sweet chocolate chips, sweetened condensed milk, remaining butter, and vanilla extract. Pour this chocolate mixture over the batter in the pan.
Step 5: Top with Remaining Batter
Drop spoonfuls of the remaining batter over the chocolate layer. It doesn’t have to be perfect; the batter will spread while baking.
Step 6: Bake
Place the pan in the preheated oven and bake for 25-30 minutes, or until the edges are lightly golden and a toothpick inserted in the center comes out clean.
Step 7: Cool and Cut
Allow the bars to cool in the pan for about 10 minutes, then transfer them to a wire rack to cool completely. Once cooled, cut into squares and enjoy!
Flavor-Forward Alternatives

Want to mix things up? Here are some flavor-forward alternatives you can try with your Peanut Butter Chocolate Bars:
- Add chocolate chips for an extra chocolatey kick.
- Incorporate crushed nuts like peanuts or almonds for added crunch.
- Try using crunchy peanut butter instead of creamy for a different texture.
- Mix in a scoop of your favorite protein powder for a healthier twist.
Frequent Missteps to Avoid
Even the best bakers can run into pitfalls. Here are some common mistakes to avoid when making your Peanut Butter Chocolate Bars:
- Not measuring ingredients accurately can lead to a poor texture.
- Overbaking can result in dry bars; keep an eye on the timer.
- Skipping the cooling step can make the bars difficult to cut.
- Not greasing the pan properly may cause the bars to stick.
Store, Freeze & Reheat
These Peanut Butter Chocolate Bars are great for storing and reheating, making them perfect for meal prep.
To store, keep the bars in an airtight container at room temperature for up to 5 days. If you want to keep them longer, you can freeze them for up to 3 months. Simply wrap individual bars in plastic wrap and place them in a freezer bag.
To reheat, simply microwave for 10-15 seconds until warm. Enjoy them warm for a gooey, melty treat!
Reader Questions
Can I use a different type of cake mix?
Absolutely! While this recipe calls for plain yellow cake mix, you can substitute it with chocolate or any flavored cake mix you prefer. Just be mindful that it may alter the overall flavor of your Peanut Butter Chocolate Bars.
What should I do if my bars are too crumbly?
If your bars turn out crumbly, it’s likely due to overbaking or not enough moisture. Ensure you’re measuring your ingredients accurately, and check the baking time to avoid dryness.
Can I add other mix-ins to the bars?
Yes! Feel free to add your favorite mix-ins such as mini marshmallows, shredded coconut, or even some caramel for a gooey surprise in the center.
How can I make these bars gluten-free?
To make these bars gluten-free, simply use a gluten-free cake mix instead of plain yellow cake mix. The rest of the ingredients are naturally gluten-free.
If you’re looking for more delicious treats that lean towards the healthier side, check out these options:
Bring It to the Table
These Peanut Butter Chocolate Bars are the perfect addition to any gathering. Their rich, decadent flavor is sure to be a crowd-pleaser, whether you’re serving them at a birthday party, a potluck, or just a cozy night in. Serve them up with a scoop of vanilla ice cream for an extra indulgent treat, or pair them with a glass of cold milk for the ultimate comfort snack.
With their simple ingredients and straightforward preparation, you’ll find yourself making these bars again and again, sharing them with friends and family, and perhaps even keeping a batch all to yourself! Enjoy the magical combination of peanut butter and chocolate in every delicious bite. Happy baking!

Peanut Butter Chocolate Bars
Ingredients
Equipment
Method
- Step 1: Preheat your oven to 350°F (175°C) for even baking.
- Step 2: In a large mixing bowl, combine melted butter, peanut butter, and egg. Mix well, then add the yellow cake mix and stir until thick.
- Step 3: Grease your baking pan and spread half of the batter evenly in the bottom.
- Step 4: Mix chocolate chips, sweetened condensed milk, remaining butter, and vanilla in another bowl. Pour over the batter.
- Step 5: Drop spoonfuls of the remaining batter on top of the chocolate layer.
- Step 6: Bake for 25-30 minutes until edges are golden and a toothpick comes out clean.
- Step 7: Cool for 10 minutes in the pan, then transfer to a wire rack to cool completely before cutting into squares.
Notes
- Store in an airtight container at room temperature for up to 5 days.
- Freeze for up to 3 months wrapped in plastic wrap.
- Reheat in the microwave for 10-15 seconds for a melty treat.
