Cake
Preheat oven to 350 degrees
Mix eggs and oil and beat slightly. Add cake mix, and pudding mix. Blend, then beat and add 5 oz. Sprite, beat, add 5 more oz. of Sprite. Stir in vanilla extract.
Grease and flour, three round cake pans. Pour batter evenly into pans, bake at 350 for 25 - 30 minutes. Press fingers lightly in the middle of the cake, if it springs back, it is done. Frost with Chocolate Icing
Chocolate Icing
Mix sugar and cocoa well in a heavy saucepan. Add all other ingredients, EXCEPT vanilla. Stir well. Turn on heat to medium high, let the mixture come to a brisk rolling boil and boil for 3 minutes. Remove from heat. Cool to room temperature. Add vanilla, beat mixture with spoon until it is thick enough to spread. Work quickly!