Tinkerbell Cake I made for my son's girlfriend. The cake and frosting had to be sugar free. So I used Pillsbury's sugar free white cake and sugar free vanilla frosting. I did add a little strawberry extract to the frosting. Mushrooms are made from gumpaste. Purple flowers are royal icing. Rose petals are gumpaste, I steamed them so they would be shiny and also dusted with pink pearl dust.