2 sticks butter
4 tbsp. cocoa
2 c. sugar
2 c. flour
4 eggs
1 tsp. vanilla
1/2 c. chopped nuts (opt.)

In microwave bowl, melt butter 1 to 2 minutes. Add cocoa, stir and cook on high 1 more minute. Remove from microwave. Add all at once: sugar, flour and eggs. Stir until just mixed. Add vanilla and nuts. Pour into greased and floured 9 x 13 inch pan. Bake 25 minutes in a 350 degree oven.