Hello!!! Have you ever use hi-ratio shortening to make IMBC? I was told that using 3/4 part butter & 1/4 part hi-ratio shortening in IMBC will make the buttercream more stable, is that right?? Thank you

I've added regular shortening to IMBC to help it hold up better in the heat of GA summers, so I would imagine Hi-ratio would work even better.

Good to know, thanks prterrel. I'll try that next time.

Could you do the same to SMBC or is that a stupid question?

I would imagine you could, but I've never made SMBC.