I’ve never tried just using straight decarbed flower powdered up. I’ve always been curious about it though cause it’s so simple.
I tried for you, lol. It works, but the effects took two hours and faded fast. Oil and lecithin make a big difference IMHO.
On powders, their best feature is how fast they work. For me in 15-20 minutes. I think it's because the maltodextrin is a carb that's digested fast. Oil in coffee works fast for me as well.
On weed taste. Feco and rso have the least taste imo. Decarbed sift hash isn't terrible either.
I make chocolate bars using silicone molds and use feco and a little sweet orange oil in the chocolate. Both chocolate and orange oil help hide the taste. All bets are off as you go over 200mg per bar though. And the chocolate I use, bars from Aldi's, already has lecithin in it.