Bock beer is a strong lager that originated in Germany, traditionally brewed in the winter months. It is known for its rich, malty flavor and darker color, which can range from amber to deep brown. Bock beers often have a slightly sweet taste, with hints of caramel and toffee, and a smooth finish. There are several variations of bock beer, including Doppelbock, which is even stronger and maltier, and Eisbock, which is concentrated by freezing. Bock is typically enjoyed during festivals and celebrations, particularly during the Oktoberfest season in Germany.