recepie needed

Can you eat the cake mix? If so, you can take a can of 7-up or cola and mix it in with the cake mix and bake it as the package says. For icing, you could use powdered sugar mixed with water and vinella. It is more of a glaze, but should work.

if you have a recipe for icing that requires eggs, maybe you could use one of those egg substitute products, like "egg breakers", that isn't made from real eggs.
i'm not a vegetarian so i,m not sure......just a suggestion.

Do you eat butter? You can make quite a nice icing with butter. Use some butter, not too much, and mostly water with the icing sugar. If it is still tasting too buttery, mix in some more icing sugar and water.