Eisbock is the strongest beer style that falls in the category of bock beers (bockbier). This beer style is primarily brewed as doppelbock, but then it undergoes freeze distillation—in which the water is partially frozen and then removed.
The final result is a brew with more concentrated flavors and a higher concentration of alcohol. Most eisbock beers are clear, and they may range from red to dark brown. Although they always have high alcohol content, usually between 9 to 14% ABV, the alcohol should never be harsh or overpowering.
Eisbock beers are full-bodied and intense with strong malt aromas and flavors reminiscent of toast and caramel. Nuances of dark fruit can sometimes be present. Despite its malt-forward profile, the character of eisbock beers should never be cloying or overly sweet.