If you’re planning on using it in the next week or so, buttercream frosting does need to be refrigerated until you need it. Simply place it in an airtight container and let it come up to room temperature before using it. Once your buttercream has warmed up, re-whip it to bring it back to a fluffy consistency.
When stored properly, buttercream frosting can last in the fridge for up to a month, and in the freezer for up to three months. Why would you want to make buttercream ahead of time? To make cake decorating is more enjoyable.
Kept in the fridge, cake with buttercream or ganache topping will last for 3-4 days. If the cake has custard, cream, cream cheese or fresh fruit it will last 1-2 days at most. Fruit cakes encased in marzipan and icing will last much longer.
Simple buttercream frosted cakes (mixture of confectioners’ sugar and butter): Store at room temperature about 3 days or up to 1 week in refrigerator. If storing in the refrigerator, it’s best to chill the cake uncovered for about 20 minutes in the freezer or refrigerator to let the frosting harden.
Too much whipping can leave air bubbles in your buttercream frosting. It’s a minor problem and won’t ruin the flavour or texture, but it may not look as pretty when it comes to decorating. Don’t leave your buttercream frosting whipping forever and ever if you don’t want air bubbles.
To harden buttercream flowers made with meringue-based buttercream, let them chill in the fridge or freezer until firm. This only takes a few minutes for smaller flowers, and maybe 10-20 minutes for larger flowers.
Most fillings and buttercream frostings can be made up to three days in advance and stored in an airtight container in the fridge. Press a piece of plastic wrap against the surface of the filling or buttercream before placing the lid on the container to prevent it from picking up fridge odors.
(See our Baking in Advance blog post.) Buttercream frosted cupcakes are good for up to two days (they are fine at room temperature) and cream cheese frosted cupcakes need to be refrigerated if kept for the second day. How should cupcakes be stored? They can be kept at room temperature out of sunlight for a day.
Store the cupcakes at room temperature– If you plan on eating the buttercream frosted cupcakes within one or two days, it is completely okay to store them at room temperature. In fact, this is probably the best place to store them as they will not dry out and the cake and frosting will both be soft and ready to eat.
When cool, frost with buttercream icing–other icings like cooked or boiled frosting don’t freeze well. Then pop the cake or cupcakes into the freezer. Remove the cake or cupcakes from the freezer and wrap with plastic wrap. You can keep a frosted cake or cupcakes in the freezer for up to three months.
According to Monts, frosted cupcakes will stay fresh in the storage container for 3-4 days. In most cases, you can leave them on the counter, but if your cupcakes are filled with cream or topped with cream cheese frosting, you’ll want to store them in the refrigerator.
To store frosted cakes in the refrigerator, chill the uncovered cake in the fridge for at least 15 minutes so that the frosting hardens slightly, and then cover with plastic wrap. Before serving, allow the cake to sit on the counter for about 30 minutes. Learn how to freeze a frosted cake for up to two months.
You can bake cupcakes up to two days ahead; arrange them (unfrosted) on a baking sheet, wrap the whole sheet with plastic wrap and store at room temperature. Frost before serving. To freeze, arrange unfrosted cupcakes on a baking sheet and wrap the whole sheet in plastic wrap, then in foil. Freeze up to three months.
If you wish to make buttercream frosting in advance it can be made a day or two earlier (at most) and kept covered in the fridge. Allow the frosting to reach room temperature for about an hour or two before use and quickly plump it up with your mixer for a few seconds.
You can bake cupcakes up to two days ahead; arrange them (unfrosted) on a baking sheet, wrap the whole sheet with plastic wrap and store at room temperature. Frost before serving. To freeze, arrange unfrosted cupcakes on a baking sheet and wrap the whole sheet in plastic wrap, then in foil.
Typically, icing is much thinner and glossier than its cousin frosting. Icing is popular when topping cookies, especially sugar or lemon. It can be used on cakes and cupcakes, but it won’t give you the look of traditional cupcakes because its consistency doesn’t allow it to hold shape.
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