Update: I no longer drink it plain. I have cayenne and raspberry versions.

It's not easy. Cayenne is a matter of taste and easy to mix. But what really works are my "raspberry crumbs." I buy fresh raspberries on sale and freeze them spread apart in a plastic bag, and once frozen, I just crumble them in the bag. This works, because I don't mind eating the raspberry bits. They're real, and I sure can't say that about any other raspberry bits I've run across.