Fustigate: (v) To beat with a club.That about sums up an Eisbock. An already strong Doppelbock that has been ice distilled, concentrated by removing the frozen water and leaving the concentrated beer behind. The last one I brewed was over seven years ago, and it is still probably the most widely remembered brew I've done. It was good, even if my stoner ex-housemates unplugged the lagering fridge while I was away for a month in Norway. But I think seven years' experience will make this next one great.
Step one in making an eisbock is planning. You can't just ice a normal doppelbock, it will be cloyingly sweet. You should brew a doppel expressly designed to ferment as dry as possible, so that when it's concentrated it sweetens up nicely. Also, make sure you have plenty of yeast around. I brewed up a Helles and an Oktoberfest just to be starters for this one. By the end I had just under a half quart of solid Wyeast Continental Lager built up.
The base is German Pils and Munich, with a pound of CaraMunich. At the last minute I decided to add 6oz of Special B, a dark Belgian crystal malt. I think it will add a nice deep caramel complexity, but time will tell whether it also added too much caramel malt and over-sweetened it. Hops are way in the background on this one, about 28 IBU of Brewers Gold and Sterling, because that's what I had in the freezer. Shot for 9.5%, when it's been iced it should be up around 11%.
RECIPE: Fustigator Eisbock
ABV (pre-eisbocking): 9.25%-9.5%. Post Eisbocking: 11%ish.
F.G.: 1.022-24 probably, 1.020 if I'm lucky.
- 10 lbs German Pils (had to use Best, would have preferred Weyermann)
- 7 lb Munich (10L)
- 1 lb CaraMunich
- 6 oz Special B
Water adjustments were:
Mash: 2 tsp chalk, 3/4 tsp Calcium Chloride, 1/2 tsp Epsom salts, 3/4 tsp Baking Soda, 1/4 tsp salt.
Boil: 1 1/2 tsp calcium chloride, 1 tsp Epsom.
90 Min Boil.
- 1 oz Brewer's Gold (Pellet) @ 9.7% AA @ 60 min
- 1/2 oz Sterling (Pellet) @ 4.3% @ 30 min
- whirlfloc tablet @ 15
- 1 t yeast nutrient @ 15
I'll give it two or three weeks to ferment out, then a D-rest for a few days. Then rack it. Slowly drop it down to 35 and lager it for a month. Then rack into a keg. Into the chest freezer and I'll drop it to 19 degrees. Swirl the keg until noticeable icebergs have formed. Then I'll use a jump-tube to rack over into a 3 gallon keg. If all goes as planned, nothing will be left in the first keg but two gallons of ice. Then I'll lager the 3 gallon keg for another month, carbonate, and bottle the whole batch in 12oz'ers with my BeerGun. That's the plan, anyway.