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4.8 from 5 votes
Stack of peanut butter brownies stuffed and swirled with peanut butter, on a blue background with an orange napkin in the background.
Peanut Butter Brownies
Prep Time
20 mins
Cook Time
50 mins
Cooling Time:
2 hrs
Total Time
1 hr 10 mins
Fudgy dark chocolate brownies, marbled with a peanut butter swirl! So quick and easy to make, from scratch! If you like Reese's, you'll love these peanut butter brownies.
Course: Dessert
Cuisine: bar
Keyword: peanut butter brownies
Servings: 18
Calories: 382 kcal
For the peanut butter swirl
For the chocolate brownie batter
To make the peanut butter swirl:
  1. Stir the powdered sugar, peanut butter, melted butter, and salt together in a medium bowl.
To make the chocolate brownie batter:
  1. Preheat the oven to 325 degrees F, mist a 9x9-inch pan with non-stick spray, and line it with parchment.
  2. Place the sugar, melted butter, cocoa, and salt in a large bowl and stir together until combined.
  3. Stir in the eggs.
  4. Add the flour and baking powder, and mix until smooth.
  5. Stir in the vanilla, then pour half the batter into the prepared pan.
  6. Drop about half the peanut butter swirl mixture in dollops over the surface of the brownie batter. Swirl with the tip of a knife.
  7. Layer the remaining brownie batter on top, and repeat the peanut butter swirl.
  8. Bake for 45 to 60 minutes, or until set around the edges but still soft towards the center.
  9. Cool completely in the pan, then transfer to a cutting board and cut into squares.

Recipe Video

Nutrition Facts
Peanut Butter Brownies
Amount Per Serving
Calories 382 Calories from Fat 207
% Daily Value*
Fat 23g35%
Saturated Fat 12g75%
Cholesterol 82mg27%
Sodium 193mg8%
Carbohydrates 44g15%
Fiber 4g17%
Sugar 32g36%
Protein 6g12%
* Percent Daily Values are based on a 2000 calorie diet.