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–+ servings
A peanut butter swirl brownie being held with more brownies behind it.
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5 from 1 vote

Peanut Butter Swirl Brownies

A delicious brownie mix upgrade that features pockets of peanut butter.
Prep Time10 minutes
Cook Time30 minutes
Total Time40 minutes
Course: Cookies Bars and Brownies
Cuisine: American
Servings: 24

Ingredients

  • 1 box fudge brownie mix, 18.3 ounce size, I used Duncan Hines
  • eggs, oil, and water called for on the brownie box
  • 1 cup creamy peanut butter
  • ¼ cup powdered sugar, sifted
  • non-stick baking spray

Instructions

  • Preheat the oven to 350℉. Spray the bottom of a 9x13-inch baking pan with nonstick baking spray.
    non-stick baking spray
  • Prepare the brownie mix according to the package directions using the water, oil, and eggs on the package. Spread the brownie mixture evenly in the prepared pan.
    1 box fudge brownie mix, 18.3 ounce size, I used Duncan Hines, eggs, oil, and water called for on the brownie box
  • In a microwave safe bowl, microwave the peanut butter on high for 30 seconds. Add the powdered sugar and stir until smooth.
    1 cup creamy peanut butter, ¼ cup powdered sugar, sifted
  • Drop the peanut butter mixture, by teaspoonfuls, onto the brownie mixture. Gently swirl the two mixtures together with a knife, making sure you have swirls throughout the pan.
  • Bake 29 to 33 minutes or until the center is set. Cool completely on a wire rack before cutting.
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