I have made a batch of SMBC for a cake this weekend. It looks like our weather is going to be high 80s-low 90s. They are having the party possibly outside.
My question is: Can I add some shortening to the batch that I have already made to give it more stability in the heat?
I assume that your event was today, if so, what happened with your BC? If it's tomorrow, you may have time to make more BC. I was going to make SMBC for an outdoor August reception and was told that any BC with butter won't work, even with shortening. I was told to make a 100% shortening buttercream. So I will go this route and add butter flavor to it.