Peanut Butter Swirl Brownies

5 from 1 vote

These peanut butter swirl brownies are rich, fudgy, and easy to make. A classic chocolate brownie with creamy peanut butter swirled in.

Prep Time10

Cook Time35

Total Time45

Course: Appetizer/Dessert

Cuisine: American

Keyword: Peanut Butter Swirl Brownies

Servings: servings

Calories: 320kcal

Preheat the oven according to the brownie mix box instructions.
Line the 9X9 brownie pan with parchment paper. You can also grease it.
Make the brownie mix according to the box directions. Mix until smooth.
brownie mix, ingredients listed on the brownie box
Add the brownie mix to the pan and spread it out evenly.
Add the peanut butter to a microwave-safe bowl and heat it for 20 seconds. Stir in the powdered sugar and vanilla until it is nice and smooth.
½ cup peanut butter, ¼ cup powdered sugar, ½ teaspoon vanilla extract
Drop the peanut butter mixture onto the brownie batter by spoonfuls.
Using a butter knife, swirl the peanut butter and brownie mixture. You can also use a toothpick to do this.
Put the pan in the oven and bake for the time listed on the box.
Once the time has passed, remove the brownies from the oven and let the pan cool for about 30 minutes.
Once the cooling time has passed, move the brownies to a wire rack to cool for about 30 more minutes.
Cut and serve.

Warm the peanut butter slightly. This helps it swirl more smoothly if it's cold in your kitchen!
Don’t over-swirl. A few gentle passes make the prettiest pattern
Let brownies cool before slicing. This will give them clean edges.