I've never used ganache before, but I know you can use it as a filling. I was going to use a chocolate ganache filling, but can I stack cakes with it, or do I need a buttercream filling?
You can absolutely use it as a filling.
You can even whip it up for a bit lighter filling.
I just used this ganache recipe tonight:
This is the only ganache recipe I use - it's wonderful as a filling and/or icing! You can stack cakes with this as a filling/icing too.
yes, you can stack cakes that have been filled and/or iced in ganache.