Usually, it is best to to avoid storing a cake decorated with fondant into the refrigerator because the fondant goes soft from the moisture and the fondant colors can run as the cake "sweats." Try to keep the cake at room temperature on a bench or pantry shelf, since both the cake and fondant has a lot of sugar, this will help to help preserve the cake at room temperature. However, if it’s too warm and you really need to refrigerate the fondant-covered cake, first place the cake inside plastic wrap, then inside a corrugated cardboard box. Tape shut before placing it into the fridge, to keep out as much moisture as possible. For more help with storing a fondant cake, including freezing it, see .