Get ready to satisfy your sweet tooth with my easy Peanut Butter Swirl Brownies recipe! These brownies are thick, fudgy, and feature a creamy peanut butter swirl that adds a tasty twist. Whether you’re hosting a party or craving a delicious treat, these brownies will impress everyone. Follow along as I guide you through each step, making baking fun and simple. Let’s dive into this chocolatey goodness together!
Why I Love This Recipe
- Decadent Flavor: The combination of rich chocolate brownies and creamy peanut butter creates an irresistible flavor that satisfies any sweet tooth.
- Easy to Make: This recipe comes together quickly, making it perfect for both novice bakers and experienced chefs looking for a simple, delicious treat.
- Perfect for Sharing: With 12-15 servings, these brownies are ideal for parties, potlucks, or any gathering where you want to impress your friends and family.
- Customizable: Add your favorite mix-ins like nuts or chocolate chips, or top with ice cream for an even more indulgent dessert!
Ingredients
List of Ingredients
- 1 cup unsalted butter, melted
- 1 ¼ cups granulated sugar
- 1 cup brown sugar, packed
- 4 large eggs
- 1 tablespoon vanilla extract
- 1 cup all-purpose flour
- 1 cup unsweetened cocoa powder
- ½ teaspoon salt
- ½ teaspoon baking powder
- ½ cup creamy peanut butter (plus extra for swirling)
Every ingredient matters in making these brownies great. You start with melted butter. This adds a rich flavor and keeps the brownies soft. Granulated sugar and brown sugar bring sweetness and moisture. The eggs help bind everything together. Vanilla extract adds a lovely aroma.
Next, we have flour and cocoa powder. These form the base of our brownies. Flour gives structure, while cocoa adds that deep chocolate taste. Salt and baking powder balance flavors and help the brownies rise.
Finally, the creamy peanut butter takes these brownies to the next level. It gives a nutty taste and a smooth texture. Swirling in extra peanut butter makes them even more fun to eat.
Gather these ingredients before you start. Trust me, you will love how they all work together to create chewy, yummy brownies!

Step-by-Step Instructions
Preparation Steps
1. Preheat your oven to 350°F (175°C). Prepare a 9x13 inch baking pan by greasing it or lining it with parchment paper.
2. In a large bowl, mix the melted butter, granulated sugar, and brown sugar. Stir until the mixture is smooth.
3. Add the eggs one at a time. Mix well after each one. Stir in the vanilla extract until it’s well combined.
4. In another bowl, whisk together the flour, cocoa powder, salt, and baking powder. Gradually add this dry mix to the wet ingredients. Fold gently until just combined. Be careful not to overmix.
5. Pour the brownie batter into the prepared pan. Spread it evenly across the bottom.
6. In a small bowl, warm the peanut butter in the microwave for about 15 seconds. It should be slightly melted but not too hot.
7. Drop spoonfuls of peanut butter onto the brownie batter. Use a knife or skewer to swirl the peanut butter into the batter. Aim for a nice marbled look.
Baking Instructions
1. Bake the brownies in the preheated oven for 25-30 minutes.
2. To check if they are done, insert a toothpick into the center. It should come out with a few moist crumbs, but not wet batter.
Tips & Tricks
Common Mistakes to Avoid
- Overmixing the brownie batter: This can lead to tough brownies. Mix until the dry ingredients are just combined. A few lumps are okay!
- Not checking the oven temperature: An incorrect temperature can ruin your brownies. Use an oven thermometer to be sure.
How to Achieve the Best Swirl
- Tips for melting peanut butter correctly: Microwave the peanut butter for about 15 seconds. It should be warm but not hot. This makes it easy to swirl into the batter.
- Techniques for an attractive marbled effect: Drop spoonfuls of peanut butter onto the brownie batter. Use a knife to cut through the batter gently. Create a figure-eight motion for a beautiful swirl! Don't overdo it, or the swirl will mix too much.
Pro Tips
- Use Room Temperature Ingredients: Ensure your eggs and peanut butter are at room temperature for a smoother batter and better incorporation.
- Don’t Overmix the Batter: Gently fold in the dry ingredients until just combined to keep your brownies fudgy and prevent a tough texture.
- Test for Doneness: Insert a toothpick into the center; it should come out with a few moist crumbs. If it’s wet, bake a little longer.
- Cool Before Cutting: Allow brownies to cool in the pan to set properly, making it easier to cut into neat squares without crumbling.
Variations
Alternative Ingredients
You can change up the sugars in this recipe. Coconut sugar works well. It has a rich flavor and can make your brownies a bit healthier. You can also use brown sugar alone for a deeper taste.
If you need a gluten-free option, try using almond flour or oat flour. Both are great at creating that fudgy texture. Just remember to adjust the amount slightly. Gluten-free flours absorb more liquid.
Add-Ins for Extra Flavor
Want to add more fun to your brownies? You can mix in chocolate chips or nuts. Dark chocolate chips add a nice touch of richness. Walnuts or pecans give a nice crunch.
If you’re feeling adventurous, try swirling in other nut butters. Almond butter has a lighter taste and blends well. Cashew butter offers a creamier flavor. Experiment to find your favorite mix!
Storage Info
Best Storage Practices
To keep your brownies fresh, store them in an airtight container. This helps to lock in moisture, keeping them soft and chewy. If you slice them, place a layer of wax paper between the layers to avoid sticking.
Use a container made of glass or plastic. Glass containers work well because they do not absorb odors. Make sure the container is clean and dry before putting the brownies inside.
Freezing Brownies
You can freeze brownies for longer storage. First, allow them to cool completely. Then, cut them into squares. Wrap each square tightly in plastic wrap. Place the wrapped brownies in a freezer-safe bag or container. This helps to prevent freezer burn.
To thaw brownies, take them out of the freezer and leave them at room temperature for about 1-2 hours. You can also warm them in the microwave for a few seconds. Enjoy them fresh, just like when you first baked them!
FAQs
How do I know when the brownies are done?
You can check if your brownies are done by using a toothpick. Insert it into the center of the brownies. If it comes out with a few moist crumbs, they are ready. If it comes out wet with batter, they need more time. Bake for 25 to 30 minutes at 350°F (175°C). Keep an eye on them, as ovens vary.
Can I make these brownies ahead of time?
Yes, you can make these brownies ahead of time. They store well for a few days. Let them cool completely before cutting and storing. Place them in an airtight container. You can also freeze them for longer storage. Just wrap them tightly and label them.
What pairs well with peanut butter swirl brownies?
Peanut butter swirl brownies pair well with many tasty treats. Consider serving them warm with vanilla ice cream. This adds a creamy contrast. A drizzle of chocolate or extra peanut butter on top is also great. For drinks, a glass of cold milk works perfectly.
In this post, we shared a tasty brownie recipe with a peanut butter swirl. You learned about the ingredients, step-by-step instructions, and tips to avoid mistakes. I also highlighted fun variations and storage tips for freshness.
Try this recipe to impress friends and family. Enjoy the rich flavors and marbled look. Bake, share, and savor each bite!