La Trappe Quadrupel: The Dutch Monks Who Named a Style

A Trappist Abbey in the Wrong Country

If you ask most beer drinkers where Trappist beer comes from, they will say Belgium. They are mostly right. Eleven of the world's fourteen Trappist breweries are in Belgium, and the styles most people associate with Trappist brewing (dubbel, tripel, the dark strong ales) are unmistakably Belgian. But there is a single, stubborn, unglamorous exception. In a flat, polder-laced corner of the southern Netherlands, just a few kilometers north of the Belgian border, sits the Abdij Onze-Lieve-Vrouw van Koningshoeven, the Abbey of Our Lady of Koningshoeven. The monks brew under the name La Trappe, and they are the only Trappist brewery in the Netherlands.

They are also, depending on which year you ask, the only Trappist brewery in the world that has ever had its hexagon revoked, lost it, gotten it back, and then sat through years of arguments about whether they truly belonged in the club. The story of La Trappe is, in many ways, a story about what counts as a real Trappist brewery, and the Quadrupel, the beer they brewed in 1991 that gave a whole style its name, is the beer that put them firmly back at the table.

Koningshoeven was founded in 1881 by a group of French Cistercian monks fleeing political pressure in their home country. The land they bought, in the Tilburg countryside, was poor sandy heath, barely fit for crops. They built a sheepfold first and lived in it for a year. They cleared the heath, drained the soil, planted, and slowly built up an abbey. By 1884, just three years in, they had founded a brewery. The reasoning was simple and deeply Trappist: the abbey needed money to support itself, the local water was good, and brewing was an honest trade for monks. The first beer rolled out of the gate the same year.

For most of the next century, Koningshoeven brewed quietly: at first traditional ales for the abbey and the local poor, then commercial Belgian-style ales as the brewery grew. The abbey took the brand name La Trappe in tribute to the order's mother house in France. Through two world wars, German occupation, post-war shortages, and the slow industrial consolidation of the 1960s and 70s, the brewery survived. Then, in 1980, came a crisis.

The Hexagon Lost and Won

By the late twentieth century, the monks at Koningshoeven were aging. The community was shrinking. Vocations to the contemplative life were thin on the ground in the secularizing Netherlands, and there were not enough brothers to keep the brewery running on monastic hands alone. Faced with the choice of closing the brewery or finding outside help, the monks chose help. In 1980, they entered into a partnership with the Bavaria brewing group, a large secular Dutch brewer that took on the operational side of producing La Trappe.

The arrangement was practical. The monks set the recipes. They controlled the brewery's mission and its profits. The lay company provided the workers and the operational backbone. To the monks at Koningshoeven, this looked like the only way to keep monastic brewing alive at the abbey. To the International Trappist Association, founded in 1997, it looked like cheating.

When the ITA codified the rules for the "Authentic Trappist Product" hexagon in 1997, La Trappe was at first not granted the label. The argument: the brewery was running on too much outside labor and not enough monastic supervision. For two years, La Trappe sold its beer without the hexagon while every other Trappist brewery had it. The monks of Koningshoeven were quietly furious. They had been brewing for over a century and now, by a new rule, they were being told they didn't qualify.

In 1999, after lengthy review and structural changes that re-asserted monastic control over the brewery's operations and mission, La Trappe was granted the hexagon. They lost it again briefly in the late 1990s, regained it, and have held it firmly ever since. Today the abbey houses a small but stable community of Cistercians who supervise the brewery, set its strategic direction, and direct its profits to the monastery's charitable work and the maintenance of the abbey itself.

It's the kind of bureaucratic drama that brewers love to argue about and most drinkers don't know exists. But understanding it matters, because it sets up what the monks did next. After spending years defending their right to be called Trappist, they made a beer that could not be confused with anyone else's, and they put a name on it that nobody else had used.

The Beer That Named a Category

By 1991, La Trappe was already brewing a Dubbel, a Tripel, and a Blond. The Belgian-style scale was familiar: dubbel for the dark double-strength abbey ale, tripel for the strong golden one. But the brewers at Koningshoeven looked at their lineup and decided there was room above the tripel. A bigger, darker, more contemplative beer. Something to drink at the end of a winter evening rather than in the middle of a summer afternoon. They brewed a strong dark ale at ten percent ABV, called it Quadrupel, and put it on the shelf.

Now: dark strong ales of around ten percent had existed in Belgium for decades. Westvleteren 12. Rochefort 10. Chimay Blue. The category was real, but it had no proper name. People called those beers "Belgian strong dark ales" or "abbey strong ales" or simply listed them by their numbers. There was a dubbel and a tripel, but the next tier up was nameless. La Trappe noticed the gap and named it: Quadrupel. The fourth in the line.

The name caught on slowly, then all at once. By the late 1990s, "quadrupel", sometimes shortened to "quad", was being used to describe a whole category of beer: dark, strong, malt-forward, abbey-style ales of around ten to twelve percent ABV. Belgian breweries that had previously sold their dark strong ales as "10" or "Grand Cru" or under brand names began retroactively calling them quadrupels. American craft brewers, just discovering Belgian styles, adopted the term enthusiastically. Today there are quads brewed in California, Colorado, Vermont, Australia, and Japan, and every one of them owes its category name to a small abbey in Tilburg in 1991.

Naming a beer style is a quietly significant act. It tells people what to expect, what to compare it to, and where it fits on the menu. The monks at Koningshoeven didn't invent the dark strong abbey ale. They just gave it a name that stuck, and in giving it a name, they made it a real category that other brewers could make their own version of. La Trappe Quadrupel is, in that sense, both a beer and a definition.

The Grain Bill: Pale, Dark, and a Hand of Sugar

For all its complexity, the recipe for La Trappe Quadrupel begins with a relatively straightforward grain bill. What makes it sing is what gets layered on top. The base is Pilsner malt, the same workhorse pale European malt used by half the breweries in Belgium and Germany. On top of that, smaller percentages of Munich and caramel malts contribute color and depth. A measure of dark crystal (sometimes Caramunich, sometimes a darker variant) provides the toffee and dark caramel notes that show up so distinctly in the finished beer. There is a touch of debittered chocolate malt for color rather than for roasted flavor: the monks don't want this beer tasting like a stout, and the chocolate is used with a light hand.

Then comes the candi sugar. Belgian-style strong ales rely on candi sugar to push the gravity up without adding so much grain that the beer becomes thick and cloying. La Trappe uses a dark candi syrup, caramelized to a deep amber-brown, that contributes burnt sugar, dark fruit, and dried plum character. The sugar helps the yeast finish the beer dry on the back end, even though the front is rich and sweet. It's the trick that makes ten percent abbey ales drinkable rather than turning them into syrups.

The hops are restrained. Northern Brewer and Hallertau, used at moderate levels, contribute just enough bitterness to balance the malt and sugar. The hops are not the point of this beer. They are scaffolding, holding up the malt and yeast architecture so the structure doesn't collapse into pure sweetness. A drinker who tries to taste hops in a Quadrupel is missing the show.

The yeast is the real star: La Trappe's house strain, a classic Belgian abbey yeast that ferments warm and produces the soft banana, clove, and dried-fruit esters that define the family. At ten percent, fermentation is a slow business. The yeast works for a week or more in primary, then conditions for several more weeks. After the beer is bottled, a fresh dose of yeast and a touch of priming sugar are added so it carbonates inside the bottle: bottle-conditioned, in the Belgian Trappist tradition. The result is a beer that continues to develop in the bottle for months and even years.

A Process in No Hurry

Watching La Trappe's brewers make Quadrupel is, by their own description, an exercise in patience. The mash is single-infusion at a moderate temperature, warm enough to get good attenuation from the rich grain bill, but not so hot that the beer ends up too sweet or too thin. The wort is boiled long, an hour and a half or more, which caramelizes some of the sugars in the kettle and adds another layer of melanoidin character to the finished beer.

Fermentation happens in tall cylindroconical tanks at temperatures that, by lager-brewing standards, would be considered alarmingly warm, in the high sixties to low seventies Fahrenheit. The yeast loves it. Esters bloom. Phenols develop. The first week is fierce; the second week is calmer; by week three the beer has dropped most of its yeast and is ready for transfer to conditioning tanks.

In conditioning, the beer rests cool for several weeks. Tannins drop out. Yeast and hop residues settle. The beer clears and rounds. The brewers taste it weekly. When it's ready (and "ready" is a judgment call, not a calendar date) it's bottled with priming sugar and fresh yeast, then warm-conditioned again so that secondary fermentation can carbonate the beer naturally inside the bottle.

From mash to shelf, the process takes the better part of two months. From shelf to peak drinkability, you can add another six months at home in a cool dark cellar. La Trappe Quadrupel is one of those beers that improves with age. A fresh bottle is excellent. A bottle that has rested two years is something else again: the yeast continuing to work on the sugars, the malt deepening into port, the dark fruit notes intensifying, the alcohol heat softening into a gentle warmth. The brewers print a best-before date on the bottle, but Quadrupel drinkers routinely treat it as a suggestion.

What's in the Glass

Pour La Trappe Quadrupel into the proper goblet and you immediately understand what kind of beer you're dealing with. It is dark: a deep mahogany-brown, with ruby-red highlights when held to the light, and a thick, persistent, off-white head that rises tall on a careful pour and laces the glass on the way down. It looks, in the right light, like a dessert beer or a fortified wine. It is exactly that, and a great deal more.

Lift the glass and the aromatics arrive in waves. The first wave is fruit. Dark, ripe, autumnal: black cherry, raisin, fig, prune, candied date. Underneath that, dark caramel and brown sugar, like the bottom of a well-roasted Sunday joint. A soft banana-clove ester from the abbey yeast hovers around the edges. There is alcohol, too (at ten percent it would be dishonest to pretend otherwise), but it presents as a warm spice rather than as a burn. A faint dried-orange-peel and clove note rounds out the bouquet.

The first sip is full. The body is thick without being heavy, velvety without being sticky. Toffee comes first: a long, slow caramel sweetness that rolls across the palate. Behind it: plum and stone fruit, brown bread crust, a dusting of cocoa nib, dried date and fig. The yeast esters add a soft fruity-spicy lift. Then, as the sip moves toward the back of the palate, the sweetness begins to dry. The candi sugar has done its work in the kettle and the yeast has done its work in the tank: this is a beer that finishes drier than its first impression promises.

The mouthfeel is one of the pleasures of the style. Carbonation is moderate and creamy, almost soft. The body is round and full but never cloying. The alcohol warms through the chest a few seconds after each sip, the way a good Cognac does. This is a beer that asks to be sipped, not gulped, and rewards a slow pace by getting more interesting as the glass warms.

The finish is long. Toasted malt, raisin, and a gentle warming alcohol hang around for the better part of a minute after each sip. There is no abrupt closure. Quadrupel doesn't snap shut at the end. It dissolves slowly, like a chord with a long sustain. Drink one over an hour and you'll notice it changing in the glass: the cold bottle is bright and fruity; the warm glass at the end is dense, rich, and almost porty.

The Glass: The Trappist Goblet

La Trappe Quadrupel is served in a wide-bowled stemmed goblet: heavy, footed, and shaped like a tulip that's been pressed slightly open at the top. The glass is purpose-built for the style. The wide bowl gives the head room to build and the aromatics room to develop. The slight rim inward at the top concentrates volatiles toward the nose. The thick stem keeps your hand off the bowl, which matters for a beer best served at cellar temperature rather than ice-cold.

Serving temperature for Quadrupel is 50-55°F (10-13°C). Too cold and the malt complexity flattens out and the alcohol presents as harsher. Too warm and the beer turns syrupy and the alcohol gets blowsy. The sweet spot is cellar-cool, which is just below standard refrigerator temperature, meaning if you pull a bottle from the fridge, let it sit on the bar for ten minutes before pouring.

Pouring is a slow business. Tilt the glass to forty-five degrees, pour gently down the side, and straighten the glass as the beer rises. La Trappe Quadrupel is bottle-conditioned, which means there is yeast sediment at the bottom of the bottle. The traditional Belgian approach is to leave the last half-inch of beer behind in the bottle so the yeast doesn't cloud the glass. Some drinkers prefer to pour the yeast in for the extra B-vitamin character. Both approaches are correct. We pour the body of the beer first and then ask the customer if they want the lees.

What to Eat With It

Quadrupel is a dinner beer, a dessert beer, and an after-dinner beer all in one. The high alcohol and rich malt structure can stand up to almost any heavy dish you put in front of it. Its dark fruit character mirrors red wine pairings: think roasts, braises, slow stews. Belgian carbonnade, beef stewed in dark beer with onions and a slice of mustard-rubbed bread, is so harmonious with Quadrupel it might as well have been written for it. A good roast duck with cherry or plum sauce, a slow-braised short rib, a wild boar ragu over pappardelle: all classic matches.

For cheese, lean older and harder. Aged Gouda, the kind that crystalizes around the edges and tastes like butterscotch, is a beautiful match for the candi sugar and dark caramel. A really sharp aged Cheddar plays the bitter against the sweet. Blue cheeses, with their saltiness, also work, though you have to choose one bold enough to stand up to ten percent abbey ale.

Dessert is where Quadrupel becomes uncanny. Dark chocolate, particularly chocolate with seventy percent cacao or above, finds an echo in the beer's cocoa-nib edge and dark fruit. Sticky toffee pudding is essentially Quadrupel served with a spoon. A walnut and fig tart with a small dollop of mascarpone is a textbook match. If you ever find yourself ordering both a Quadrupel and a tiramisu in the same sitting, you have done something right.

How We Serve It at Mort Subite

La Trappe Quadrupel at Mort Subite is treated with the gravity ten-percent Trappist ale deserves. The goblet comes out of the back bar clean, dry, and at room temperature, never frosted. Frosted glassware kills the head, mutes the aromatics, and is, in this bar's view, an act of small violence against good beer. We pull the bottle from refrigerated storage, set it on the bar to take the chill off, and crack it open in front of the customer so the cap goes onto the bar with a satisfying click.

The pour is slow. Forty-five-degree tilt at the start, building the beer up the side of the glass, straightening the goblet as the meniscus rises and the head builds in a thick off-white crown. We stop a half-inch short of the bottom of the bottle, where the yeast sediment lives, and we pause to ask whether you want the lees. Yes is a perfectly good answer. So is no. Either way the beer that ends up in your glass is honest.

We serve Quadrupel late afternoon and evening. It is not a noon beer. It is the beer you order after dinner, when the room has dimmed and the conversation has slowed and someone at the table wants something with more weight to it than the second tripel they were thinking about. We pair it most often with our cheese board (particularly the aged Gouda and the blue) and with the carbonnade when it's on the menu. We also serve it as a digestif on its own, no plate required, in a quiet corner of the bar with a small glass of water alongside it.

The bottles we keep are Quadrupel in its standard release. From time to time the distributor offers Quadrupel Oak Aged (the same beer rested in oak barrels for several months, picking up vanilla, soft tannin, and added complexity) and when we can get it, we get it. If you've never had a Quadrupel and you want to know why the style matters, start with the standard. If you already know the standard, ask whether we have the Oak Aged in stock.

A word on pace: ten percent ABV in a 330 ml bottle is a real glass of beer. Drink it slowly. Let it warm. Talk between sips. La Trappe Quadrupel is not a beer that wants to be hurried, and the people who hurry through it are the ones who go home wondering why they feel so suddenly sideways. Two of these over an evening, with food, is plenty for almost everyone, and it should be, because each glass is doing real work for you in flavor and in alcohol both.

Check the draft menu, or ask the bar what is on today. Come meet the only Dutch Trappist, and the beer that named a style.