03/01/2026
How hops made it into beer. Hurrah for Hildegard
Beer brewing in medieval Europe was closely tied to monastic life, where monks were responsible for producing safe and reliable food and drink for their communities.
Water was often unsafe to consume, so beer became a daily staple, valued for both nourishment and hydration. Early medieval beer spoiled quickly, however, especially when transported or stored for extended periods. This problem led monastic brewers to experiment with ingredients that could slow spoilage and stabilize flavor.
One of the earliest written references to hops in brewing appears in 822 AD at the Abbey of Corbie Abbey. Administrative records from the monastery mention hop gardens, indicating that hops were being cultivated and deliberately added to beer.
Hops contain natural antibacterial compounds that inhibit the growth of microbes responsible for souring, making beer last longer without turning undrinkable. This discovery was especially valuable for monasteries supplying beer to travelers, pilgrims, and surrounding communities.
By the twelfth century, the preservative qualities of hops were clearly understood. Hildegard of Bingen wrote that hops prevented beer from spoiling, even noting their bitter taste as part of their stabilizing effect.
As monasteries refined brewing methods, hopped beer gradually replaced earlier herbal mixtures known as gruit, which varied widely in composition and reliability.
The spread of monastic brewing knowledge helped standardize beer production across northern Europe. Hopped beer could be stored longer, transported farther, and produced with more consistent results. By the late Middle Ages, hops had become a defining ingredient in beer throughout much of the continent.
