1 stick butter
4 tbsp. cocoa
1 c. water
2 eggs, beaten
1/2 c. buttermilk
1 tsp. vanilla
2 c. flour
2 c. sugar
1 tsp. baking soda
1/4 tsp. salt

Combine butter, cocoa and water in microwave bowl. Cook on High. Bring to a boil. Combine balance of ingredients to hot mixture. Bake in sheet cake pan (jelly roll) for 20 minutes at 350 degrees. Do not grease pan.