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Single peanut butter stuffed brownie square on white plate showing glossy chocolate ganache top and visible peanut butter chunks inside on white marble
Bia

Peanut Butter Brownies

These peanut butter brownies are rich, fudgy, and packed with layers of chocolate and creamy peanut butter swirl. They’re simple to make with basic ingredients and give you a bakery-style dessert right at home. Perfect for chocolate lovers who enjoy a soft, gooey center with a smooth chocolate ganache topping.
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Prep Time 15 minutes
Cook Time 30 minutes
Total Time 45 minutes
Servings: 36
Course: Dessert
Cuisine: American
Ingredients Method Notes

Ingredients
  

Peanut Butter Filling
  • 3/4 cup peanut butter
  • 1/2 cup granulated sugar
  • 1 egg room temperature
Brownie Batter
  • 12 oz semi-sweet or bittersweet chocolate chips
  • 6 tbsp unsalted butter
  • 3/4 cup granulated sugar
  • 1 tsp vanilla extract
  • 3 eggs room temperature
  • 1/4 cup unsweetened cocoa powder
  • 1/3 cup cornstarch
  • 1/2 tsp salt
  • 1 cup mini chocolate chips
Ganache
  • 10 oz bittersweet chocolate chopped
  • 1/2 cup heavy whipping cream

Method
 

  1. Preheat oven to 350°F (175°C) and prepare pan.
  2. Mix peanut butter filling and set aside.
  3. Melt chocolate + butter, then mix in sugar, vanilla, and eggs.
  4. Add dry ingredients and stir until smooth.
  5. Fold in mini chocolate chips.
  6. Layer batter + peanut butter mixture in pan.
  7. Bake 33–37 minutes (until moist crumbs on toothpick).
  8. Cool completely.
  9. Make ganache and spread on top.
  10. Chill, cut, and serve.

Notes

These peanut butter brownies are best when you don’t rush the cooling step, I know it’s tempting, but letting them cool completely is what gives you those clean, fudgy slices. If you want extra bakery-style results, chill them for a bit before cutting. Also, don’t overmix the batter once the dry ingredients go in, because that’s what keeps the texture soft and rich instead of cakey. You can easily adjust sweetness by using dark chocolate or semi-sweet chocolate depending on your taste.