Quick Delicious Brownies
["1/2 c. butter", "1 c. sugar", "4 Tbsp. cocoa", "2 eggs", "1 c. flour", "1/2 tsp. baking powder", "pinch of salt", "1/2 tsp. vanilla", "1/2 c. nuts (optional)"]
["Melt butter in a medium saucepan.", "Add sugar and cocoa.", "Mix thoroughly.", "Remove pan from heat.", "Add remaining ingredients. Spread batter in a greased and floured 9-inch square pan.", "Bake at 350\u00b0 for 25 to 30 minutes.", "Makes about 2 dozen 1 1/2-inch squares."]
["butter", "sugar", "cocoa", "eggs", "flour", "baking powder", "salt", "vanilla", "nuts"]