This cake is PERFECT for birthdays. It makes quite a presentation for adults or kids. White 7 minute frosting is the real kicker, but I have used just a regular white buttercream and it still looks great.
Cream margarine and sugar till fluffy. Add eggs one at a time. In a separate bowl, mix cocoa, coffee, and food coloring till a smooth paste is formed. Blend into the creamed mixture. Mix flour, salt and soda, and add to mixture alternately with sour milk or buttermilk. Add vanilla. Pour into two greased and floured cake pans, and bake at 350° for 30 minutes or till tops spring back when lightly touched.
Cool completely before frosting.
Note: Take care which of your utensils you use to mix coloring mixture. Plastic or wood will pick up the red color and stain permanently. I always use metal and glass.