I'm going to ice a cake with white chocolate ganache/buttercream (1:1 ratio) this weekend. My question is when should I mix the two? Does it matter? I have the buttercream done, but should I wait until right before icing the cake to make the ganache and mix with the buttercream?
Also, I used a crusting buttercream recipe, but when mixed with ganache, does anyone know if it will still crust?