This was my son's irst birthday cake from last week. The grass is made of gumpaste, the cake is buttercream and buttercream filling. I did not use a special pan, instead I baked an 8", 6" and cake batter in an aluminum mixing bowl that was 5". I leveled and stacked all three then used a coupler without an opening to pipe the concentric design with a softened buttercream. The bees are gumpaste as well with royal icing eyes.