If your buttercream recipe is made with all butter, it will need to be refrigerated. An all-butter recipe may melt off your cake once it’s reached room temperature. If you’re making a pure white buttercream with no butter and just shortening, it can stay out at room temperature for up to 2 days.
How long can buttercream be left out?
In general, buttercream can sit out at room temperature for up to 2 days.
What happens if you don’t refrigerate buttercream?
Does frosting go bad if not refrigerated? Buttercream frosting will not go bad if left out at room temperature for up to three days, but it’s not the same story for all kinds of frosting. Whipped cream frosting and cream cheese frosting, for example, must be refrigerated immediately, or they will spoil.
