Ingredients
Instructions
- In a 3-quart pan over low heat, heat butter until melted.
- Remove from heat and stir in sugar, eggs, vanilla, flour, peanut butter, and baking powder until smoothly blended.
- Evenly spread batter in a buttered and floured 8-inch square pan.
- Bake in 350°F oven until edges feel firm to touch and begin to turn a shade darker, 25 to 30 minutes.
- Run a knife between pan rim and baked brownie.
- Cool in pan on a rack, about 1 hour.
- Cut into 9 or 16 squares.
- Store in airtight container up to 2 days, or freeze to store longer.