I just watched the three part youtube videos by InpiredByMichelle on how to make ganache, cover cake with ganache, and cover ganached cake with fondant to get sharp edges, to prepare for making my son's birthday cake and make/use ganache for the first time. I will fill and cover cake with ganache and cover with MMF. (I plan on spreading ganache, not pouring, if that makes a difference in your answers.)
In the videos the ganache (made of twice as much cream as chocolate, only) is refridgerated overnight after it's first made. After that, it sits out overnight after cake is covered in ganache, and again after covered with fondant before moving/stacking the next day so it's firmer when handled. That's already 2 nights sitting out.
If I stack/decorate at this point (after 2nd night), the day before the party, I will need to let it sit out again -- for a 3rd night. Is this okay?
In some videos, the ganache sits out overnight (not in fridge) after it's first made to firm up. Is this better than putting in fridge? This however would add another night of not being refridgerated. Can ganache sit out this long?