A buddy of mine just made an acorn beer. after lots of research and an hour phone conversation with an oldtimer, boil till water is clear is not accurate. He was told boil acorns, switching water every 5-10 min(have next pot of water up to boiling before transfer, do not let acorns cool in between switchover). Taste at each water change, bitterness(tannin) is gone they are ready. Oldtimer said that sometimes they will go to mush and be useless long before the water is clear, thus the taste test in between swapping. So this is the method my buddy used and the beer is sooooo good. He has made this recipe before only w/o the acorns. they added such interesting notes, I cant w8 to hear how this acorn wine turns out.