Oops:)
Never had this happen before. Had to crash an IPA of which my Belgian blonde was at 30F set the IPA car boy in the freezer with prob attached to the side of it and it dropped the temp of the blonde to low:(. It was only there for 24 hrs. Blonde taste fine. I would expect it to bump up the alcohol? But the FG gravity stayed the same
It would only bump up the ABV if you then removed the ice, leaving the concentrated beer: eisbeer is made this way
It wasn’t all the way frozen just a moderate slush so I just racked the beer off into keg. It was only 3 gallons
If you racked and left some ice and slush behind, it should have increased the FG and therefore ABV, but if you did not leave much behind, it would not make a huge difference I guess. Never tried, but have read about making Eisbock. I am sure someone with more experience and knowledge on the subject will chime in as everyone gets moving today
You are lucky the glass did not crack.