- 1 1/2 cups peanut butter
- 2/3 cup butter, softened
- 1 cup white sugar
- 1 cup brown sugar
- 3 eggs
- 1 teaspoon vanilla extract
- 2 cups all-purpose flour
- 1/3 cup unsweetened cocoa powder, or more to taste
- 2 teaspoons baking powder
- 1/2 teaspoon salt
- Preheat oven to 350 degrees F (175 degrees C). Grease a 9×13-inch baking pan.
- Beat peanut butter and butter together with an electric mixer until creamy and blended. Add white sugar, brown sugar, eggs, and vanilla extract. Mix on low speed until just blended.
- Whisk flour, cocoa powder, baking powder, and salt together in a small bowl. Fold flour mixture into peanut butter mixture until blended. Pour batter into prepared baking pan.
- Bake in the preheated oven until the edges of the brownies are crisp and a toothpick inserted in the center comes out mostly clean, 35 to 45 minutes.