Kasteel Donker is a well-known Belgian quadrupel beer created by Brouwerij Vanhonsebrouck. With a rich history of crafting strong, dark brown beers, this brewery expertly highlights the roasted malt flavour in its signature brew. This full-bodied ale boasts a deep brown colour and a bold taste, featuring a blend of caramel, coffee, and chocolate notes that come together in a complex and approachable way. This ale is a great choice for connoisseurs of dark and robust beers, perfect for slowly sipping and savouring, especially during the colder months or as a post-meal treat with its high alcohol content.