The brewery produces two Trappist beers, Orval and Orval Vert.
Evidence of brewing goes back to the earliest days of the monastery. A document written by the abbot in 1628 directly refers to the consumption of beer and wine by the monks. The last of the brewers to be a monk was Brother Pierre, up until the 1793 fire.
In 1931 the present day brewery was built, employing lay people and intended to provide a source of funds for the monastery reconstruction. It was designed by Henry Vaes, who also designed the distinctive Orval beer glass. The first beer was shipped from the brewery on 7 May 1932, and was sold in barrels rather than the bottles of today. Orval was the first Trappist beer to be sold nationally around Belgium.
As with other Trappist breweries, the beer is sold in order to financially support the monastery and some other good causes. All of the profits from the sale of the beer are distributed to charities and for community development around the region.
Orval is the main brand. It is a 6.2% abv beer. It was first made in 1931, and has a complex and unusual flavor and aroma produced by a unique strain of yeast: Brettanomyces lambicus. The beer is light in color, slightly cloudy, and has a large, foamy head. There is a complex aroma of leather, spice, and many other earthy components.
Beer critic Michael Jackson considered Orval to be "a wonderful aperitif", and a "world classic". Its very distinctive taste is largely attributed to two parts of the brewing process. One of these is the use of dry hopping, in which large meshed bags of hops infuse the beer during the three-week maturation period. The other is the use of Brettanomyces yeast during this same maturation, which are a local wild yeast. Hallertau, Styrian Goldings and French Strisselspalt hops are used.
Orval beer is bottled exclusively in a distinctive skittle shaped 33 cl bottle. The bottling plant has a capacity of 24,000 bottles per hour. The beer is then matured at 15 °C for a minimum of four weeks on site before being distributed. Beer that will be sold at the Abbey or local cafe is matured for six months. As the beer is bottle conditioned, its flavour can evolve over the years with aging.
Orval Vert is a 4.5% abv, available only in keg in the café near the monastery.
The brewery is normally closed to the public, but opens its doors for two days each year. There are presently 32 secular workers.
- Kelly, Laura. "Best beers made by Trappist monks". foxnews.com. Fox News. Retrieved 22 March 2016.
- Oliver, Garrett (2011). The Oxford Companion to Beer. Oxford University Press. p. 797.
- "Michael Jackson's Beer Hunter - Chastity, poverty and a pint". www.beerhunter.com. Retrieved 25 March 2011.
- Villa, K., "Orval Brewery" in Oliver, G. (ed.), The Oxford Companion to Beer (Oxford University Press, 2012), pp. 630-631.