Irresistible Brownies
["3/4 c. (1 1/2 sticks) butter", "2 c. sugar", "1 1/2 c. all-purpose flour", "1/2 c. Nestle cocoa", "1/2 tsp. baking powder", "1/4 tsp. salt", "4 eggs", "2 tsp. vanilla extract", "1 (12 oz.) pkg. Nestle Toll House semi-sweet chocolate morsels, divided", "1/2 c. nuts, chopped (optional)"]
["Preheat oven to 350\u00b0.", "In a 2 1/2 to 3-quart saucepan over low heat, melt butter.", "Remove from heat.", "Add sugar, flour, cocoa, baking powder, salt and vanilla extract.", "Stir with a spoon until well blended and smooth.", "Stir in 1 1/2 cups Nestle semi-sweet morsels and nuts.", "Spread in a 13 x 9-inch baking pan.", "Spread with rest of nuts and morsels.", "Bake for 30 to 35 minutes.", "Cool on wire rack.", "Cut into squares."]
["butter", "sugar", "flour", "cocoa", "baking powder", "salt", "eggs", "vanilla extract", "chocolate", "nuts"]