I am making a pull apart cupcake cake with buttercream icing and want to try and save some time by decorating the night before? what is the best way to store it or will the BC get hard overnight? I appreciate any input.

In the cake box you'll deliver the cake in.

Forgot to mention it all depends on what kind of filling you used. If it's a whipped cream or cream cheese filling put cake in box and keep in frig. It's not that hard where you can't cut it. Bc softens as it comes to room temp.

Yep, unless those cupcakes have a perishable filling, store them in the delivery box on your counter.

I never put my cupcakes in the refrigerator - it dries them out. If it's just a regular cupcake cake just leave it in the box as others said.

I have taken the plastic bag (ones a dry cleaner would use) and place lightly over the cake/cupcakes.....it keeps air out and is very light and will not spoil the decorations on cakes.