Quadrupels

Quadrupel, often shortened to Quad, is a Belgian beer style described as a strong, dark, malt-forward ale. The term was popularized in the 1990s by Koningshoeven (La Trappe) to denote a high‑alcohol beer that sits above Tripel in strength and body. The designation is not universally codified, and individual brewers interpret the category with variation.

Appearance and flavor characteristics are typical of a Quadrupel: a deep amber to brown color with a full, creamy head and a rich, chewy mouthfeel. Flavor tends to center on caramelized and roasted malts, with dark fruit notes such as raisin, fig, or plum. Esters and phenols can add ripe fruit and spice, while hopping provides a subtle balance rather than a dominant bitterness. Alcohol is often noticeable but integrated, contributing warmth rather than sharpness. The finish is frequently long and optionally gently astringent or sweet, depending on the recipe.

Production and serving details: Quadrupels usually rely on a substantial malt bill and may include sugar or candy sugar to boost ABV without excessive heaviness. Many are bottle-conditioned, allowing flavors to evolve with age. They are typically served in a goblet or tulip glass to concentrate aromas and are best enjoyed slightly cooler than room temperature. Proper aging can enhance complex notes and a smoother mouthfeel.

Scope and examples: Quadrupels are produced by several Trappist and other Belgian breweries, with La Trappe Quadrupel serving as a widely cited exemplar. The style encompasses a range of interpretations, from very dark, intensely malty ales to those with more yeast-derived fruit character.