Elegant and fun – this simple Christmas tree cake design is perfect for any holiday celebration. If you’ve decided against the 3D Christmas Tree Cake, then this layer cake version is for you. Another thing to love about this cake? The fluffy white cake layers and buttercream. It’s sweet and fluffy frosting made by creaming butter and sugar. Other common ingredients include milk (to create the perfect texture) and vanilla (for simple, crowd-pleasing flavor).