Quadrupel, also known as Belgian Quadrupel or Abbey Quadrupel, is a strong and robust beer style that originated in Belgium. It is characterized by its deep amber to dark brown color and rich, complex flavors. Quadrupels are full-bodied and often have a high alcohol content, typically ranging from 8% to 12% or even higher.These beers showcase a variety of malt flavors, including caramel, toffee, dark fruits, and hints of chocolate. The malt sweetness is balanced by a moderate to high level of bitterness, which helps to prevent the beer from becoming overly sweet. Quadrupels often exhibit aromas of dried fruits, such as raisins, figs, and plums, along with spicy notes of cloves, pepper, and sometimes even a touch of banana.The yeast used in the fermentation process contributes to the unique flavors and aromas found in quadrupels, adding fruity esters and spicy phenols. The beer is typically bottle-conditioned, meaning it undergoes a secondary fermentation in the bottle, resulting in increased carbonation and complexity over time.Quadrupels are often enjoyed as sipping beers, meant to be savored and appreciated slowly. They can be quite rich and heavy, with a warming alcohol presence.