Fondant cake - purple yam cake with coconut cream filling vote now PreviousNext OtherVery Easy30 min Send this recipe to a friend Print this page Ask a question to the author Post your photo of this recipe Ingredients 4 Three inch round purple yam cake; use a third of the Lemon Cake recipe, and took out all the lemon related ingredients, then replaced it with about 1/2 tsp purple yam flavouring. Coconut cream filling. Swiss buttercream. View the directions