The story
For decades, the strongest dark beers from Belgium’s Trappist abbeys had no special category name. Brewers simply called them by their numbers or their abbey titles. Then in 1991 the Dutch Trappist brewery De Koningshoeven launched La Trappe Quadrupel, giving a name to the style. Beer lovers found it catchy, and “quad” became shorthand for these rich, powerful ales.
Beer judges often classify them as “Belgian Dark Strong Ale,” but whatever you call them, they include some of the most celebrated beers in the world — including legendary offerings from the abbeys of Westvleteren and Rochefort.
What it tastes like
A quad pours deep amber to dark brown, often with ruby highlights and a creamy tan head. The aroma is a feast: dark fruits like plum, raisin, fig and cherry, caramel, toffee, and warming spice. On the palate it is full and rich, with layers of sweet malt, dried fruit, and a gentle spicy yeast character. Despite its strength, a good quad feels smooth and balanced, with alcohol providing warmth rather than heat. The finish can be moderately dry, which keeps it from becoming cloying.
How it’s made
Brewers use a base of pale malt with specialty malts for depth, and dark Belgian candi sugar or syrup contributes colour, dark-fruit flavour and fermentability. Hops are kept in the background. A characterful Belgian yeast works at warm temperatures to create fruity esters and spice. Most quads are bottle-conditioned and can age beautifully for years, developing more complex dried-fruit and sherry-like notes.
Fun fact
Westvleteren 12, brewed by the monks of Saint Sixtus Abbey, is famously difficult to buy. The monks brew only enough to support their community and sell mainly directly from the abbey, often by reservation, and they ask buyers not to resell. Its scarcity has only added to its legendary reputation.