Go Back
Homemade peanut butter brownies with chocolate swirl on a white plate, photographed from above on a white kitchen counter.

Peanut Butter Swirl Brownies

Rich, fudgy peanut butter brownies with a creamy swirl of peanut butter and deep chocolate flavor—perfectly chewy, sweet, and indulgent.
Print Recipe Pin Recipe
Prep Time 15 minutes
Cook Time 30 minutes
Cooling Time 15 minutes
Total Time 1 hour
Servings: 12 squares
Course: Dessert, Snack
Cuisine: American
Calories: 285
Ingredients Equipment Method

Ingredients
  

  • 1 cup all-purpose flour
  • ¾ cup unsweetened cocoa powder
  • ½ teaspoon salt
  • ½ teaspoon baking powder
  • ¾ cup butter softened
  • 1 ¾ cups granulated sugar
  • 3 large eggs room temperature
  • 2 teaspoon vanilla extract
  • ¾ cup creamy peanut butter
  • ½ cup chocolate chips optional mix-in
  • ¼ cup powdered peanut butter optional for extra flavor

Equipment

  • 1 9x9-inch square baking pan Grease or line with parchment
  • 1 Electric mixer For creaming butter and sugar
  • 2 Mixing bowls Wet and dry ingredients
  • 1 set Measuring cups and spoons Standard set
  • 1 Whisk For blending dry ingredients
  • 1 Spatula Folding and spreading batter
  • 1 Toothpick For testing doneness
  • 1 Wire cooling rack For cooling brownies
  • 1 Knife For swirling and cutting squares

Method
 

  1. Preheat oven to 350°F and grease a 9x9-inch baking pan.
  2. Mix flour, cocoa, salt, and baking powder in a bowl.
  3. Cream butter and sugar until fluffy, then add eggs and vanilla.
  4. Fold in dry ingredients and chocolate chips.
  5. Pour half the batter into the pan and spoon peanut butter on top.
  6. Add remaining batter and swirl peanut butter with a knife.
  7. Bake 25–30 mins until a few crumbs stick to a toothpick.
  8. Cool 15 mins, transfer to rack, and cut into squares.