The refrigerator is your buttercream’s safe word. Pop it in an airtight container. Press a piece of plastic wrap directly onto the surface. This stops a weird, crusty skin from forming, which nobody wants on their cupcake.
It will last a solid two weeks in there. That’s longer than most of my New Year’s resolutions. When you open the lid later, it will look firm and unimpressive. Don’t panic. Cold buttercream is just playing hard to get.
Here’s the quirky bit: buttercream is a moody artist. Cold makes it dense and stiff. It won’t spread smoothly. But that’s fine—you just need to coax it back to life. Trust the process.
