We brewed two seasonal ales, a Christmas and a Pumpkin. Our brew day began at 5:00pm on a Friday and ended at 2:00am on Saturday morning. The long hours, late night and a few beers each conspired to mess us up.
We missed our mash temps by a lot. Our thermometers were all wrong, the pumpkin absorbing heat and a lack of attention all added up to less than 50% efficiency on one of the beers and less than 60% on the other.
Lots of lessons learned.
Los Angeles Brewers 