"Boon Geuze Mariage Parfait has an alcohol content of 8%. It consists of 95% mild lambic, aged at least three years and specially reserved for this purpose, and 5% young lambic. The latter provides the fermentable sugars and wild yeasts. After mixing in a vessel of 25,000 litres, the wort (unfermented mixture) is filtered and chilled. If we are bottling, we bring it back to fermentation temperature. The bottles are placed in a climate-controlled space for the secondary fermentation. This is followed by maturing at low temperature for at least 6 months. Want to know the bottling date? Simply subtract 20 years from the “best before” date!
The soft, mildly sour berry taste, harmonises with the oak barrels’ aromas in which Geuze Mariage Parfait has ripen. The body speaks of vanilla followed by a bitter aftertaste of cloves that becomes increasingly intense. Sublime."

"Brewing is science, expertise, intuition, but sometimes also archival work. Our passion for tradition doesn't stop with the beer itself: every now and then we delve into history, searching for forgotten knowledge. We were recently reminded of a remarkable document from the State Archives of Brussels: an ordinance from 1559, drawn up by Remy Le Mercier, city treasurer of Halle. A piece that will undoubtedly cause a stir among connoisseurs.
The text specifies the correct grain ratios for local beers from that time. Today, the document is considered the oldest known recipe linked to lambic. What immediately stands out? The mention of oats. A grain rarely found in lambic today, but still legally permitted alongside 60% barley malt and 30% wheat. That beer recipes evolve over time is beyond dispute. Technology changes, and legislation also has an impact. And yet: Le Mercier's grain ratio is still remarkably close to what is the standard today.
Thanks to Remy Le Mercier, we know that lambic has been brewed since at least the 16th century. So we used his ordinance as a guide for an exclusive Oude Geuze. On February 22, 2024, we filled no fewer than 5,400 75cl bottles. With this Oude Geuze Remy Le Mercier, we prove that oats can indeed play a role in the production of Oude Geuze. The result: A soft, full-bodied Oude Geuze with a firm head and a clearly recognizable nutty oat flavor."