This week, we dive into John's first Jar of Destiny beer of 2024; Eisbock.
The trick with Eisbock is brewing a great Bock and then freezing just enough water out of the batch without losing too much of the batch itself. This results in a stronger beer than the original batch.
We sample bot pre and post the freeze process. The original Bock was very good. Malt complexity and a touch of noble hop character. It finished with a hint of that 8.5% ABV poking through on the finish. A well crafted and brewed Bock, check! The Eisbock version seemed a touch sweeter and surprisingly it was a big smoother in its presentation. While we estimated this beer to now be about 12% ABV it did not drink that way. It was very pleasant a touch more malty as you'd expect. But while you could feel the effect of the higher ABV it didn't present that way on the palate and you could easily consume this version a little too quickly if you didn't know it.
Recipe:
Eisbock Recipe - BJCP 9B
5 US Gallon batch size
9 gallons of Spring Water with 4 grams of gypsum and 4 grams of Calcium Chloride
Grains
62% Weyermann® Floor-Malted Bohemian Pilsner Malt
34% Weyermann® Dark Munich Malt
5% Weyermann® Caramunich III Malt
Hops
.5 ounce of Magnum Hops Pellets 12.3% AA)
.5 ounce of Hallertaur Mittelfruh Hop Pellets 2.6% AA
Yeast
4 Packets of Saflager W-34/70 Lager Yeast
Mashed for 60 minutes at 155° F (68° C)
Boiled for 75 minutes, ensuring original gravity target
Chilled to 50°F (10°C) and fermented for 3 weeks
Racked and conditioned for 1 month at 33° F (0.5° C)
Racked 1.75 gallons into mini keg
Put in freezer for 6 hours. Closed transfer of non-frozen beer into other mini keg.
Original Gravity: 1.085
Final Gravity: 1.020
ABV: 8.53%
Eisbock ABV: 11.9%
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