I just buy the premade one from my local cake supply store. Since I frost all my cakes with Pastry Pride, I don't really use alot of buttercream, at least not enough to make my own. The premade stuff works great for FBCT!
I just looked at your cake and it looks great! However in your description you say you put the transfer in the refridgerator overnite. No wonder it was still wet, it has to be completly Frozen! Put it in the freezer for a few hours and it should be frozen solid, that way it will peel off easily from the paper.
Hola babyprincess el que yo uso es el Pastry Pride. Es un tipo de crema batida que no necesita refrigeracion. Yo lo uso para TODO, incluyendo rellenos. Ve mis fotos y veras. Le puedes agregar cualquier saborizante que gustes. Y lo mejor para mi es que ya viene preparado, solo se deshiela y lo bates! Yo vivo en California y lo compro en Smart & Final. Espero que mi respuesta te ayude en algo!
Here's a super easy recipe for Twinkie filling. It's from a site that copycats recipes. Ingredients:1/4 lb butter 1/2 cup Crisco 1 cup granulated sugar 1 (5 1/3 ounce) can evaporated milk 2 teaspoons vanilla Directions:Beat the mixture without stopping for 30 minutes. Sufficient to fill 24 cakes.
I've heard this before but never tried it. If you brush piping gel on the backside of the wafer paper and let it dry for a few days it becomes "waterproof" of course not literally, but it's supposed to not curl. It might be worth a try!
When I have used wafer paper, it tends to wrinkle up and gets soggy when liquid touches it. Also I don't know what your cake is frosted with but if it's moist like whipped cream the paper will get soggy once it's put on the cake due to it absorbs any moisture.