You did a wonderful job and gave me an idea for my grandson's birthday in July (hoping not to hot; chocolate may melt).  He loves Kit Kats and peanut butter cups ... hmmm

Hi gonzamm, as this cake was just cake, buttercream and chocolate, it was fully refrigerated until an hour before serving. So if it's a hot day it shouldn't be a problem as long as you can keep it in the fridge :)