I have been decorating cakes for about a year. I have always used a standard buttercream with 1/2 butter and 1/2 shortening, but I have never been too crazy about the taste because it is so sweet. This weekend I made a cake for my mother-in-law and tried SMBC. Everyone liked the flavor much better than the standard buttercream. (They have tried tons of my cakes.)
I have two cakes that I need to make over the next few weeks. The first cake is to be covered in fondant, so my first question is can you use SMBC under fondant?
The second cake is for a friend that would prefer that the tiers be covered in SMBC rather than fondant, but there are fondant decorations that will need to be placed on the sides of each tier and the top. Can I attach dried fondant / gumpaste decorations to a SMBC covered cake?
Yes and yes.
Does it need to be refrigerated, even if you use under fondant?
SMBC does not require refrigeration whether or not there is also fondant on the cake.