The climate where you live makes a huge difference too. In a warm climate these would turn into a puddle about 30 minutes after you took them out of the fridge. I guess if you live in, like, Scandinavia or something? Or only did them in wintertime. Or turn the AC way waaay down.

I don’t even bother shaping my icing for this very reason. If it stays on the cake and is smooth, I’m happy. Try googling “buttercream consistency,” there are a plethora of answers!

Put your cake in the fridge for a few minutes before putting frosting on

if it goes soft and runs, the cake/cookie might be too hot