Peanut Butter and Chocolate Chunk Brownies

Preparation

1. Step 1

   Preheat oven to 350°F. Generously butter and flour 8-inch square baking pan. Using electric mixer, beat butter in large bowl until smooth. If oil has separated from peanut butter, stir to blend. Add peanut butter to butter; beat until well blended, scraping down sides of bowl occasionally. Beat in brown sugar. Add eggs 1 at a time, beating well after each addition. Beat in vanilla. Sift flour, baking powder and salt into medium bowl. Add to peanut butter mixture; beat until blended. Stir in chocolate.

   Step 2

   Transfer batter to pan. Using spatula, smooth top. Bake until toothpick inserted 2 inches from edge of pan comes out with moist crumbs attached, about 33 minutes. Transfer pan to rack and cool completely. (Can be made 3 days ahead. Cover; store at room temperature.)

   Step 3

   Cut brownies into squares.