I haven't used indydebi's BC recipe, but based on the pudding and dream whip ingredients they are scary, ummm, I mean sort of similar.
Pudding is sugar, starch and flavor and dream whip is the same plus oil.
instant pudding ingredients:
Sugar, Dextrose (from Corn), Modified Food Starch, Contains Less than 2% of Natural and Artificial Flavor, Salt, Disodium Phosphate and Tetrasodium Pyrophosphate (for Thickening), Mono- and Diglycerides (Prevent Foaming), Yellow 5, Yellow 6, Artificial Color, BHA (Preservative).
Dream whip ingredients:
sugar, dextrose, partially hydrogenated vegetable oil (coconut and palm kernel oils), modified cornstarch, propylene glycol monostearate (emulsifier), sodium caseinate (from milk), and less than 2% of cellulose gel, cellulose gum, hydroxypropyl methylcellulose, natural and artificial flavor, acetylate mono- and diglycerides (emulsifiers), sodium silicoaluminate (anticaking agent), yellow 5, yellow 6
Here is a thread discussing the same topic with some more tips http://cakecentral.com/t/653861/indydebis-buttercream-dairy-free