buttercream in the heat????

[peopletalk]

im doing a charity bake sale type thing but its outdoors im making brownies cookies etc but also fairy cakes with buttercream icing would i be best putting cakes in a cooler box or do you think they cakes will hold up seeings as its so hot right now??

thanks x

I'd buy lemon drizzly ones in this weather, with normal icing and bit lemon peel in middle.
def cooler for buttercream, won't be pretty if it melts