I used mostly buttercream frosting and it held up fairly well (although it was a warm day). I did frost them the day before and they hardened up a smidge which helped keep the frosting from visibly separating.
1/3 of the cupcakes had a marshmallow frosting that I was less thrilled with flavor-wise but it held up perfectly in the heat. Italian meringue is also a good performer in hot humid weather.
Comments
I used mostly buttercream frosting and it held up fairly well (although it was a warm day). I did frost them the day before and they hardened up a smidge which helped keep the frosting from visibly separating.
1/3 of the cupcakes had a marshmallow frosting that I was less thrilled with flavor-wise but it held up perfectly in the heat. Italian meringue is also a good performer in hot humid weather.