Moist Brownies
["1/2 c. melted butter or margarine", "1 c. sugar", "1 tsp. vanilla", "2 eggs", "1/2 c. all-purpose flour", "1/3 c. cocoa", "1/4 tsp. baking powder", "1/4 tsp. salt", "1/2 c. chopped nuts (optional)"]
["Blend butter, sugar and vanilla in large bowl.", "Add eggs. Using a wooden spoon, beat well.", "Combine flour, cocoa, baking powder and salt.", "Gradually blend into egg mixture.", "Stir in nuts. Spread in greased 9-inch square pan.", "Bake at 350\u00b0 for 20 to 25 minutes or until brownie begins to pull away from edges of pan. Cool; cut into squares."]
["butter", "sugar", "vanilla", "eggs", "all-purpose", "cocoa", "baking powder", "salt", "nuts"]