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Rich and fudgy chocolate brownies with creamy peanut butter swirls baked throughout. An easy homemade-style dessert perfect for parties, holidays, and family treats.

Peanut Butter Swirl Brownies

Rich and fudgy chocolate brownies with creamy peanut butter swirls baked throughout. An easy homemade-style dessert perfect for parties, holidays, and family treats.
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Ingredients Equipment Method Notes

Ingredients
  

  • Brownies
  • 1 box brownie mix
  • Eggs oil, and water as directed on package
  • Peanut Butter Swirl
  • ¾ cup creamy peanut butter
  • ¼ cup softened butter
  • ¾ cup powdered sugar
  • 1 teaspoon vanilla extract

Equipment

  • 9×13-inch baking pan
  • mixing bowls
  • Electric mixer or whisk
  • measuring cups
  • Measuring spoons
  • Rubber spatula
  • butter knife
  • cooling rack

Method
 

  1. Preheat oven according to brownie mix directions.
  2. Grease a 9x13-inch baking pan.
  3. Prepare brownie batter according to package instructions.
  4. Spread batter evenly into pan.
  5. Mix peanut butter, butter, powdered sugar, and vanilla until smooth.
  6. Drop peanut butter mixture over brownie batter.
  7. Swirl gently with a knife to create a marble pattern.
  8. Bake for 25–30 minutes until set.
  9. Cool completely before slicing.
  10. Serve and enjoy.

Notes

Avoid overmixing the swirl.
Let brownies cool for cleaner cuts.
Add chocolate chips for extra richness.
Store leftovers in an airtight container.
Freeze individual squares for easy desserts later.