3 c. flour
1 1/2 c. sugar
2/3 c. cocoa
2 1/4 tsp. baking powder
1 1/2 tsp. baking soda

Mix together, then stir in:

Then gradually stir in: 1 1/2 tsp. vanilla

Bake in a greased 9x13 pan at 350 degrees for 45 minutes.