How I store my buttercream when I make it ahead of time Nothing super fancy, but here's what's important: Give the buttercream time to get back to room temperature after you've refrigerated it AND then re- beat it to restore that light and fluffy texture. Using room temp buttercream will also make it easier to spread and smooth the buttercream. So now that you've seen how to make and store the layers and buttercream ahead of time…. are you feeling less stressed about making a cake from scratch??