Take some final precautions and store your cake the best way possible. After all, your time, effort and creativity have made it very special!
Beware of the following factors, which can affect the look of your decorated cake:
Sunlight – will alter icing colors. Keep your cake stored in a covered box and out of direct sunlight.
Humidity – can soften royal icing and gum paste decorations. If you live in a climate with high humidity, prepare your royal icing using only pure cane confectioners' sugar (not beet sugar or dextrose), add less liquid and add 1 more teaspoon Meringue Powder to the recipe.
Heat – can melt icing and cause decorations to droop. Keep your decorated cake as cool as possible and stabilize buttercream icing by adding 2 teaspoons Meringue Powder per recipe. Protect your cake by placing it in a clean, covered cake box. Avoid using foil or plastic wrap to cover a decorated cake – these materials can stick to icing and crush delicate decorations. The icing that covers your cake determines how it should be stored – in the refrigerator, at cool room temperature, or frozen, if storing for longer than 3 days. If you want to store your iced cake in a different way than noted, make a small test cake.
Note: Cakes with thoroughly-dried royal icing decorations should be stored according to the type of icing they are covered with. However, if royal icing decorations are to be put on a cake that will be frozen, it is recommended that icing decorations be placed on the cakes after thawing, so that colored decorations won't bleed from condensation or become soft.