One candy too many

Miss Moon is on her birthday and Luke and Lola have made her an incredible candy cake. But after a mouthful of cake, Miss Moon pops in, sipping powdered sugar, and her wand produces jumping marshmellows. Apparently, Miss Moon is allergic to human sweets. Her wand does not react anymore either. The only antidote is blue chocolate. There is a special edition, but only every thousandth board is blue and it caught by the baroness.