handmade buttercream fondant is too soft and greasy. Receipe of 1 cp crisco, 1 cp karo, 1 tsp vanilla, 1/2 tsp salt, 2 lb powdered sugar. I even tried to reduce the crisco to 14 oz instead of 16 oz and add a little more powdered sugar but by the time I get it rolled out and put on the cake it is ripping - help! 
I start with my basic buttercream made up--2 cups fat (crisco or half crisco & butter) with 2lbs. of PS. I add in some light corn syrup--maybe 1/3 cup and then knead in PS until I get a nice, rollable dough.
I roll it out between parchment paper & then fridge or freeze until it's pretty stiff. I use the warmth of my hands to smooth it out.
I find that just my hands make it greasy. Once it cools to room temp again, it's a little less so, but still often shiny. I think it's just the nature of the beast.
Rae
I've tried making it in the past and it was a disaster as well. But I get emails from a company called YummyArts.com and sometimes they post videos. Last week's video was making rolled buttercream, and the woman used hi-ratio shortening. Her rolled buttercream came out perfect, it didn't look greasy at all. I don't know if HR shortening makes a difference, but I may try it again.
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