Into a bowl, sift together the flour, sugar and cocoa. Put the water, margarine
and butter in a saucepan and heat until the butter melts. Add to the
dry
ingredients. Add the eggs, buttermilk, baking soda and vanilla
and mix
together. Spray bundt pan with nonstick cooking spray and bake
at 400° for 20 minutes. Cool on a wire rack.
Mix the icing ingredients together and pour over hot cake.
Recipe adapted from "Tell Me More" from the Junior League of Lafayette,
LA