Now, I’m not saying you should never refrigerate them. Life happens. Maybe you made forty cupcakes for a party on Saturday, and it’s only Wednesday. If you need to store them for more than two days, the fridge is a better home than the counter.
Another exception: if your buttercream has cream cheese in it or any dairy like milk or heavy cream that isn’t from a sealed carton, you should refrigerate it. Dairy goes bad fast, and nobody wants a sour cupcake. Same goes for fillings like custard or fruit curd—those need the cold.
Also, if you live in a humid climate, your buttercream might get a little sweaty on the counter. Stick them in the fridge for 15 minutes before serving to firm them up again. It’s a quick fix that saves the day.
Should Buttercream Icing Be Refrigerated? Storage Tips For Freshness
The Best Way to Store Them (Counter Edition)
Okay, so you’re leaving them out. But here’s the trick: you need to protect them from air. A cupcake dome or a large airtight container is your best friend. Buttercream exposed to air will form a weird crust called a “skin.” It’s not bad for you, but it’s not pleasant to eat.
I use a simple plastic cake carrier. It keeps my cupcakes from drying out and stops my cat, Mr. Whiskers, from poking his nose into the frosting. True story—he once walked away with a chocolate cupcake on his face. Never leave them uncovered on the counter overnight.
