Mash at 152F for 60 to 90 minutes. A mash-out at 168-170F for 15 minutes is recommended, but not necessary. Drain, sparge, and proceed with a 90 minute boil. The extended boil for the all-grain is to eliminate precursors to DMS, which can leave a vegetal, creamed-corn flavor in beers with a high proportion of pilsner malt.
If using a lager yeast, chill to 48-52F, pitch yeast, and allow to ferment at 48-52F for 2 to 3 weeks. A diacetyl rest at 8 to 10 degrees higher than fermentation temperature is recommended for 2-3 days near the end of fermentation. Check the gravity, and perform the diacetyl rest when gravity has dropped 2/3 to 3/4 of the way to the expected final gravity. Once final gravity is reached, lager the beer for 2 to 6 weeks at 38-44F before bottling or kegging.
A secondary fermentation for one to two weeks to improve clarity and reduce sedimentation is optional.
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