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–+ servings
Stack of Peanut Chocolate Swirl Brownies with pumpkins in the background for Halloween.
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Halloween Peanut Butter Brownies Recipe

Rich and fudgy with a swirl of creamy peanut butter, these Halloween Peanut Butter Brownies are a simple yet festive treat. Perfect for parties, potlucks, or anytime you’re craving the classic chocolate and peanut butter combo.
Prep Time10 minutes
Cook Time30 minutes
Total Time40 minutes
Servings: 16 servings
Calories: 216kcal
Author: Stephanie Wilson

Ingredients

  • ½ cup butter melted
  • 1 tablespoon vegetable oil
  • 1 cup sugar
  • 2 eggs
  • 1-½ teaspoon vanilla
  • ¾ cup flour
  • ½ cup unsweetened cocoa powder
  • ½ teaspoon baking powder
  • ¼ teaspoon salt

Peanut Butter Swirl

  • 3 tablespoons butter melted
  • ½ cup peanut butter
  • ¼ cup powdered sugar
  • red food coloring
  • yellow food coloring

Instructions

  • Preheat oven to 350 degrees F and line a 9 x 9-inch baking pan with overhanging layers of parchment paper. Set aside.
  • In a microwave-safe bowl, combine ½ cup butter and chocolate chips. Microwave in 30-second increments, whisking after each, until completely smooth. Then mix in the granulated sugar until completely combined; whisk in the eggs and vanilla.
  • With a spatula or spoon fold in the flour, cocoa powder, baking powder, and salt. Set aside.

Peanut Butter Swirl

  • Melt butter in a medium-size bowl and add a few drops of yellow and red food coloring, until the butter has a nice orange color. Add the peanut butter and confectioners sugar and mix together until smooth.
  • Drop big spoonfuls of the chocolate brownie batter randomly into the prepared pan. Top with spoonfuls of the peanut butter batter. Using a knife, swirl the batters together. Sprinkle with additional chocolate chips.
  • Bake 30 to 35 minutes or until a toothpick inserted in center comes out mostly clean. Cool completely; about 1 hour. For 16 brownies, cut into 4 rows by 4 rows.

Notes

  1. Peanut Butter: Warm peanut butter slightly for easier swirling.
  2. Swirls: For a cleaner swirl pattern, use a toothpick or skewer.
  3. Baking Tip: For extra fudgy brownies, slightly underbake and chill before slicing.

Nutrition

Calories: 216kcal | Carbohydrates: 22g | Protein: 4g | Fat: 14g | Saturated Fat: 6g | Polyunsaturated Fat: 2g | Monounsaturated Fat: 5g | Trans Fat: 0.3g | Cholesterol: 41mg | Sodium: 155mg | Potassium: 103mg | Fiber: 2g | Sugar: 15g | Vitamin A: 273IU | Calcium: 21mg | Iron: 1mg