My mulberry tree is putting out like crazy this year and I've got a good stock of berries in the freezer. I read in some of the other mulberry threads that the stems have too much tannin to leave them on. There's no way I'm removing the stems from that many berries and I don't have a steam juicer. How about mashing them then adding some boiling water and pectic enzyme and letting it sit for several days then straining before making up the must?