1/2 c. butter, softened
1 c. sugar
1 tsp. vanilla flavoring
2 eggs
1/2 c. flour, self rising
1/2 c. unsweetened cocoa powder

Preheat oven to 350 degrees. Grease 13 x 9 inch pan. Beat butter in large bowl until light. Gradually beat in sugar, then vanilla. Add eggs one at a time, beating well after each addition. Combine flour and cocoa. Add to butter mixture. Spoon into pan. Bake 25 minutes or until toothpick comes out clean.