Ingredients
1 cup sugar
2/3 cup flour
1/2 cup unsweetened cocoa powder
1/2 teaspoon baking powder
1/2 cup (1 stick) butter, cut into 8 pieces
2 eggs, beaten to blend
1 teaspoon vanilla
Heaping 1/2 cup chocolate chips
1/2 cup chopped walnuts (if desired)
Preparation
Preheat oven to 350 degrees F. Generously grease 8-inch square baking pan. Combine sugar, flour, cocoa, and baking powder in large bowl. Blend in butter 1 piece at a time until mixture resembles coarse meal. Add eggs and vanilla. Blend just until dough starts to come together. Add chocolate chips and nuts, blending just until mixed. Spread batter evenly in prepared pan. Bake until tester inserted in center comes out clean, about 30 minutes. Cool slightly.
