a) Traditional Bock
Traditional bocks are made with all malt and are strong, malty, medium- to full-bodied, bottom-fermented beers with moderate hop bitterness that should increase proportionately with the starting gravity.
Hop flavor should be low, and hop aroma should be very low.
Bocks can range in color from deep copper to dark brown.
Fruity esters may be perceived at low levels.
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b) German-Style Helles Bock/Maibock
The German word "helles" means light colored, and, as such, a helles bock is light in color.
Maibocks also are light-colored bocks.
The malty character should come through in the aroma and flavor.
Body is medium to full.
Hop bitterness should be low while "Noble-type" hop aroma and flavor may be at low to medium levels.
Bitterness increases with gravity.
Fruity esters should be minimal.
Diacetyl levels should be very low.
Chill haze should not be perceived.
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c) Doppelbock
Malty sweetness is dominant, but should not be cloying.
Doppelbocks are full-bodied and deep amber to dark brown color.
Astringency from roasted malts is absent.
Alcoholic strength is high, and hop rates increase with gravity.
Hop bitterness and flavor should be low and hop aroma absent.
Fruity esters are commonly perceived, but at low to moderate levels.
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d) Eisbock
Deep copper to black.
Very alcoholic.
Aroma and flavor profile is similar to doppelbock.
Traditionally brewed by freezing a doppelbock and removing the resulting ice to concentrate the beer and increase the alcohol content.
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