Best and Easiest Chocolate Cake (With Orange Butter Icing)

2 cups white sugar
1 - 3/4 cup flour
3/4 cup cocoa
2 teaspoons baking soda
1 tsp baking powder
1/2 teaspoon salt
2 eggs
1 cup buttermilk
(If you don't have buttermilk, substitute 1 cup milk with 1 tbsp of lemon juice or vinegar)
1 cup cold coffee
1/2 cup oil
1 teaspoon vanilla

Mix dry ingredients together well.  Add in remaining wet ingredients and blend until smooth.  Pour into greased 9 x 13 inch pan and bake at 350 degrees for 35 to 40 minutes or until inserted toothpick comes out clean.

Cool then ice.

Also makes 24 cupcakes.

Orange Butter Icing

grated peel of one orange
4 teaspoons fresh squeezed orange juice
1 tablespoon fresh squeezed lemon juice
1/4 cup butter
1 egg yolk
2 to 3 cups icing sugar - depending on desired stiffness
1/2 teaspoon vanilla

Beat together zest, juices, butter and egg until creamy.  Beat in icing a cup at a time until desired consistency.  Beat in vanilla.  Frost cooled cake or cupcakes.