I'm hosting a party for my son who's turning three at a park. We'll be under cover but not air conditioned - and we're in the middle of a hot Texas summer. The party is early in the day so it's likely to apenas be around 80-85 Fahrenheit. Still not an ideal temperature for my go-to, a simple American buttercream.
Is there a frosting type that will keep looking good on cupcakes and be stable for assembling a small two-layer cake at this temperature for the two hours of the party? It's also the only part of the cake my son is likely to eat, so it should taste good and I'd prefer to avoid shortening-based frosting.
I'd read that Italian buttercream does well at warmer temperatures but it's also got uncooked egg whites, which isn't great sitting outside for a while and with kids (2-3 years old), I'm hesitant to use it.