Peanut Butter Chocolate Cookie Bars
There’s something irresistibly comforting about the combination of peanut butter and chocolate. It’s a timeless duo that brings a sense of nostalgia and joy, whether it’s in the form of a classic cookie or a decadent dessert. Today, I’m excited to share with you a recipe for Peanut Butter Chocolate Cookie Bars that perfectly captures that beloved flavor pairing. These bars are chewy, rich, and oh-so-delicious! Perfect for an afternoon snack, dessert, or even a sweet treat for gatherings, these cookie bars are sure to become a staple in your baking repertoire.
Why This Recipe is a Keeper

Peanut Butter Chocolate Cookie Bars are not only easy to prepare but also yield a crowd-pleasing result. With just a handful of simple ingredients, you can whip up these delightful bars in no time. The combination of creamy peanut butter and melted chocolate creates a rich, gooey texture that is simply irresistible. Plus, they store well, making them ideal for meal prep or for those moments when you need a quick sweet fix. The addition of coarsely chopped peanuts adds a wonderful crunch, taking these bars to the next level. Trust me, once you make these, they will quickly become a favorite!
The Essentials
To make your own Peanut Butter Chocolate Cookie Bars, you will need the following ingredients:
- 1 cup peanut butter – Use creamy or crunchy, depending on your preference.
- 1 cup sugar – Granulated sugar works best for the sweetness.
- 2 eggs – These provide structure and moisture.
- 1 can (14 ounces) sweetened condensed milk – This adds richness and sweetness.
- 2 ounces unsweetened baking chocolate, melted and cooled – Adds that deep chocolate flavor.
- 1 teaspoon vanilla extract – Enhances the overall flavor.
- 1 cup coarsely chopped peanuts – For a delightful crunch.
Prep & Cook Tools
Before you dive into baking, gather these essential tools:
- Mixing bowls – Use at least two bowls for mixing ingredients.
- Measuring cups and spoons – Accuracy is key in baking.
- Baking dish (9×9 inches) – This is the perfect size for your cookie bars.
- Spatula – For mixing and spreading the batter.
- Whisk – To thoroughly combine your wet ingredients.
- Oven mitts – Safety first when handling hot pans!
Step-by-Step: Peanut Butter Chocolate Cookie Bars

Ready to make your Peanut Butter Chocolate Cookie Bars? Follow these simple steps for success!
Step 1: Preheat the Oven
Preheat your oven to 350°F (175°C). This ensures that your bars bake evenly.
Step 2: Prepare the Baking Dish
Grease your 9×9-inch baking dish, or line it with parchment paper for easy removal.
Step 3: Mix the Wet Ingredients
In a large mixing bowl, combine the peanut butter, sugar, and eggs. Use a whisk to mix until smooth. Then, add the melted and cooled unsweetened baking chocolate and vanilla extract. Stir until everything is well combined.
Step 4: Incorporate the Sweetened Condensed Milk
Gradually add the sweetened condensed milk to the mixture, stirring continuously until fully blended. This will give your bars that rich, fudgy texture.
Step 5: Add the Chopped Peanuts
Fold in the coarsely chopped peanuts using a spatula, ensuring they are evenly distributed throughout the batter.
Step 6: Pour and Spread the Batter
Pour the batter into the prepared baking dish and spread it evenly with the spatula.
Step 7: Bake to Perfection
Place the baking dish in the preheated oven and bake for 25-30 minutes, or until the top is set and a toothpick inserted in the center comes out with a few moist crumbs.
Step 8: Cool and Cut
Once baked, remove the dish from the oven and let it cool in the pan for about 10-15 minutes. Then, transfer to a wire rack to cool completely before cutting into bars.
Seasonal Ingredient Swaps

Feel free to get creative with your Peanut Butter Chocolate Cookie Bars by making the following swaps:
- Nut Butters: Try almond butter or cashew butter for a different flavor profile.
- Sweeteners: Substitute coconut sugar or maple syrup for a healthier option.
- Mix-ins: Incorporate chocolate chips, dried fruits, or other nuts for added texture and flavor.
- Flavor Enhancements: Add a sprinkle of cinnamon or a pinch of sea salt for a delightful twist.
Pro Tips & Notes
- Ensure your ingredients are at room temperature for easier mixing.
- Do not overbake; the bars will continue to firm up as they cool.
- For a deeper chocolate flavor, consider using dark chocolate instead of unsweetened.
- If you prefer a softer bar, reduce the baking time by a few minutes.
Refrigerate, Freeze, Reheat
These Peanut Butter Chocolate Cookie Bars store wonderfully! Here’s how to handle them:
- Refrigerate: Keep them in an airtight container in the fridge for up to a week.
- Freeze: You can freeze the bars for up to three months. Just wrap them tightly in plastic wrap and then in aluminum foil.
- Reheat: For a warm treat, pop them in the microwave for about 10 seconds before serving.
Helpful Q&A
Can I use natural peanut butter in this recipe?
Yes, you can use natural peanut butter. Just ensure it’s well-stirred, as natural varieties can separate. The texture may vary slightly, but the flavor will still be delicious!
What can I use as a substitute for sweetened condensed milk?
You can make your own by combining 1 cup of milk with 1 cup of sugar and simmering it until it thickens, or use a dairy-free version made from coconut milk and sweetener.
How do I know when the bars are done baking?
Look for the edges to be set and the center to be slightly firm but not dry. A toothpick inserted in the center should come out with a few moist crumbs.
Can I add chocolate chips to the batter?
Absolutely! Adding chocolate chips is a great way to enhance the chocolate flavor and texture. Just fold them in along with the chopped peanuts.
Serve & Enjoy
Once your Peanut Butter Chocolate Cookie Bars have cooled, cut them into squares and serve them up! These bars are perfect for a dessert platter, a sweet treat for a picnic, or just a cozy evening snack. Pair them with a glass of cold milk or a hot cup of coffee for a delightful experience.
You’ve just created something special that not only satisfies your sweet tooth but also brings the comforting flavors of peanut butter and chocolate to the forefront. Enjoy every bite, and don’t be surprised if they disappear quickly—these Peanut Butter Chocolate Cookie Bars are definitely a hit!

Peanut Butter Chocolate Cookie Bars
Ingredients
Equipment
Method
- Preheat your oven to 350°F (175°C). This ensures that your bars bake evenly.
- Grease your 9x9-inch baking dish, or line it with parchment paper for easy removal.
- In a large mixing bowl, combine the peanut butter, sugar, and eggs. Use a whisk to mix until smooth. Then, add the melted and cooled unsweetened baking chocolate and vanilla extract. Stir until everything is well combined.
- Gradually add the sweetened condensed milk to the mixture, stirring continuously until fully blended. This will give your bars that rich, fudgy texture.
- Fold in the coarsely chopped peanuts using a spatula, ensuring they are evenly distributed throughout the batter.
- Pour the batter into the prepared baking dish and spread it evenly with the spatula.
- Place the baking dish in the preheated oven and bake for 25-30 minutes, or until the top is set and a toothpick inserted in the center comes out with a few moist crumbs.
- Once baked, remove the dish from the oven and let it cool in the pan for about 10-15 minutes. Then, transfer to a wire rack to cool completely before cutting into bars.
Notes
- Ensure your ingredients are at room temperature for easier mixing.
- Do not overbake; the bars will continue to firm up as they cool.
- For a deeper chocolate flavor, consider using dark chocolate instead of unsweetened.
- If you prefer a softer bar, reduce the baking time by a few minutes.
