2 sticks butter, melted plus 1/2 c. cocoa
2 c. sugar
4 eggs
1 1/2 c. flour

Nuts and/or chocolate chips, optional. Let the butter and cocoa cool, then add the sugar, eggs, flour and nuts and/or chocolate chips. Mix by hand in one bowl. Bake in a greased and floured 9x13 inch pan at 350 degrees for 25 to 30 minutes.