Best Brownies
["1 c. butter", "2 c. sugar", "2 tsp. vanilla extract", "4 eggs", "3/4 c. Hershey's cocoa", "1 c. all-purpose flour", "1/2 tsp. baking powder", "1/4 tsp. salt", "1 c. chopped nuts (optional)"]
["Heat oven to 350\u00b0.", "Grease 13 x 9-inch baking pan.", "Melt butter; stir in sugar and vanilla.", "Add eggs, one at a time, beating well after each addition.", "Add cocoa; beat until well blended.", "Add flour, baking powder and salt.", "Beat well.", "Stir in nuts.", "Pour batter into prepared pan.", "Bake for 30 to 35 minutes or until brownies just begin to pull away from sides.", "Cool; cut into bars.", "Makes about 36 brownies."]
["butter", "sugar", "vanilla extract", "eggs", "cocoa", "flour", "baking powder", "salt", "nuts"]