Fudgy Peanut Butter Brownies With A Creamy Swirl

Peanut butter brownies are one of my favorite treats to make when I want a sweet snack that feels comforting. They are soft and fudgy with a rich chocolate base and creamy peanut butter swirls that melt together in every bite.

The recipe uses simple ingredients, and the steps are easy enough for anyone to follow. I love how the peanut butter and chocolate mix together without any extra effort. After baking, the brownies come out glossy on top and soft in the center, ready to be cut into squares.

I often make these brownies when friends come over or when my family wants a quick dessert after dinner. They are also a great match for other dessert recipes I enjoy, like Soft Gingerbread Brownies and Brown Butter Espresso Brownies. Each one has its own flavor but all share the same cozy, homey feel.

Why This Peanut Butter Brownies Recipe Works

These brownies work so well for a few key reasons. First, the chocolate base stays fudgy without being dry. Some brownie recipes bake too long or overmix the batter, which can make them tough. This recipe keeps the center soft while the edges stay slightly firmer.

Second, the peanut butter swirl melts gently into the chocolate during baking. It forms ribbons of creamy flavor that you can see and taste in every square. You do not need to create a perfect swirl. A few gentle waves are enough to make it look beautiful.

Finally, the recipe is simple and flexible. It uses ingredients you likely have at home. You can also add chocolate chips, chopped peanuts, or even a little caramel swirl without changing the texture. The brownies come out fudgy and rich, no matter what you add.

Ingredients You Will Need

For the brownie base

• 1 cup butter, melted
• 2 cups sugar
• 4 large eggs
• 1 teaspoon vanilla extract
• 1 cup flour
• 1 cup cocoa powder
• 1/2 teaspoon salt
• 1/2 cup chocolate chips

For the peanut butter swirl

• 1/2 cup creamy peanut butter
• 1/4 cup powdered sugar
• 1/4 cup chopped peanuts for extra crunch
• 1/4 cup mini chocolate chips

These ingredients are easy to find in most kitchens and come together quickly to make soft, rich brownies.

Step-by-Step Instructions

Step One: Prepare the pan

Line an eight-inch square baking pan with parchment paper. Make sure the paper goes up the sides so you can lift the brownies out easily. This also helps the brownies keep their shape and prevents sticking.

Step Two: Mix the dry ingredients

In a medium bowl, sift together the flour, cocoa powder, and salt. Sifting helps remove clumps and keeps the brownie texture smooth. Set this aside for later.

Step Three: Mix the wet ingredients

In a large bowl, whisk together the melted butter and sugar until well combined. Add the eggs one at a time, stirring after each addition. Then add the vanilla extract and mix until smooth.

Step Four: Combine wet and dry

Gradually fold the dry ingredients into the wet mixture using a spatula. Mix just until no flour streaks remain. Overmixing can make the brownies dense, so fold gently. If using chocolate chips, stir them in now.

Step Five: Prepare the peanut butter swirl

In a small bowl, combine the peanut butter and powdered sugar. Stir until smooth. The mixture should be thick but easy to spoon.

Step Six: Assemble the brownies

Pour the brownie batter into the prepared pan and smooth the top with a spatula. Drop small spoonfuls of the peanut butter mixture over the top. Use a knife or spatula to gently swirl the peanut butter into the batter. Do not mix too much. You want the chocolate and peanut butter to stay distinct.

Step Seven: Bake

Preheat the oven to 350 degrees Fahrenheit. Bake the brownies for 30 to 35 minutes. The edges should look set while the center remains slightly soft. A toothpick inserted into the center should come out with a few moist crumbs but not wet batter.

Step Eight: Cool and slice

Allow the brownies to cool in the pan for at least 30 minutes. Lift them out using the parchment paper and place them on a cutting board. Use a sharp knife to cut them into squares. Wipe the knife between cuts for clean edges. The brownies will be soft and fudgy in the middle with creamy peanut butter ribbons on top.

Helpful Tips for Best Brownies

• Use creamy peanut butter for smooth swirls. Crunchy peanut butter will not create the same ribbon effect.
• Do not overmix the batter. Folding gently keeps the brownies soft.
• Allow brownies to cool before cutting. This helps them hold their shape.
• If you want thicker brownies, slightly reduce baking time. For firmer brownies, bake a few minutes longer.
• Chocolate chips and peanuts can add extra texture if you like.

How to Store

Store brownies in an airtight container at room temperature for up to three days. For longer storage, place them in the refrigerator for up to a week. You can also freeze brownies for up to three months. Wrap them individually in parchment paper and then place them in a sealed container. Thaw at room temperature for about 20 minutes before serving.

Variations to Try

• Add a swirl of caramel to make peanut butter caramel brownies.
• Top with crushed chocolate cookies for extra crunch.
• Mix in mini chocolate chips or chopped peanuts for added texture.
• Sprinkle a pinch of sea salt on top before baking to enhance the peanut butter flavor.

These variations let you personalize the brownies without changing the fudgy texture.

Frequently Asked Questions

Can I use natural peanut butter?
Yes, but it may be runnier. The swirl will be softer and may blend more into the chocolate.

Why are my brownies too dry?
This usually happens if they are baked too long or overmixed. Keep the center slightly soft when removing from the oven.

Can I double the recipe?
Yes. Use a larger pan and adjust baking time as needed.

Can I use dark cocoa powder?
Yes. It will make the brownies richer and slightly more chocolatey.

Can I make these ahead of time?
Absolutely. You can bake them a day in advance. Store them in the fridge or freeze individual squares for later.

Final Thoughts

Fudgy peanut butter brownies are a treat that everyone enjoys. The chocolate stays soft and gooey, while the peanut butter adds creamy ribbons of flavor. The recipe is simple enough for a weeknight dessert and special enough for family gatherings or holidays. Pair them with other favorites like Soft Gingerbread Brownies or Brown Butter Espresso Brownies for a dessert spread that will impress everyone. These brownies bring comfort, sweetness, and a rich chocolate-peanut flavor in every square.