I want to cover a cake with MMF tomorrow, but the original cake recipe calls for 7 muinute frosting - can I go ahead and use the 7 min frosting (I've never tried making it before, so don't know what it's like) or should I just use a buttercreme and then cover with MMF?

I'd use buttercream. Seven-minute frosting is extremely soft/gooey and I can't imagine it would support the weight of fondant well. It does also soften over time/with refrigeration.

Thanks very much. I ended up using buttercream, and decided to save the 7 min frosting for another day. Perhaps I'll use it this weekend!

I Love 7 minute frosting. It's a bit like divinity. It has a hard surface but soft underneath . I've been using it a lot lately. It's anice alternative to buttercream.

Sorry not sure if alternative is the right word. It's a nice change.

what is 7 minute frosting??????

Basically egg whites, sugar, a bit of water cooked in a double boiler for 7 minutes. Off heat vanilla is added ( and food coloring of desired). I've used on cakes then added a few buttercream decorations. Fall back is it can have a grainy texture the next day. So frost & eat same day. Don't have recipe handy but I'm sure you can google it.