Bocks are a strong style of German beer that originated in the city of Einbeck. They are typically characterized by their rich malt flavor, which can include notes of caramel, toffee, and chocolate. Bocks are usually darker in color and have a higher alcohol content, ranging from 6% to 12% ABV. There are several sub-styles of bock, including Doppelbock, which is even stronger and maltier, and Eisbock, which is made by freezing the beer to concentrate its flavors. Bocks are often enjoyed during colder months and are popular during Oktoberfest celebrations.