Chocolate yam cake buttercream roses DessertEasy1 h 45 m Send this recipe to a friend Print this page Ask a question to the author Post your photo of this recipe Ingredients 8 Ingredients for cake: 1 pack of chocolate sponge cake premix 1.5 cup of water 1/3 cup of olive oil 3 eggs Ingredients for yam filling: 1 medium size yam, 250g (peel, steam until soft) 250ml thickening cream 2 tbsps sugar Ingredients for buttercream: 250g, 1 stick of butter (soften) 3 cups of powder sugar 3 tbsps milk 1 drop of green food colouring View the directions