3 c. all purpose flour, less 3 tbsp.
2 c. sugar
2 tsp. soda
1 tsp. salt
1/2 c. cocoa
2 c. cold coffee
1 c. vegetable or corn oil
2 tbsp. vinegar
1 tbsp. vanilla

Sift together flour, sugar, soda, salt, and cocoa. Add coffee, oil, vinegar, and vanilla and beat until smooth using an electric mixer. Bake in greased and floured 9 x 13 pan at 350 degrees for 40 minutes or until tests done. As soon as cake is out of oven, cover it with the following icing.

1/3 c. soft butter
3 c. sifted powdered sugar
3 squares unsweetened chocolate, melted
3 tbsp. cream or evaporated milk, or plain milk
1 1/2 tsp. vanilla

Mix butter and sifted powdered sugar until smooth. Stir in melted chocolate cream or milk and vanilla, adding a bit more milk if necessary.

You could substitute cocoa for chocolate if needed.