Kwak: The Coachman's Beer and the Most Famous Glass in Belgium

A Stagecoach, An Innkeeper, and a Problem

Picture the Flanders countryside in the last decade of the 18th century. The roads are mud in winter and dust in summer. The stagecoach, the diligence, is the lifeline between villages, carrying mail, merchants, and travelers across a patchwork of duchies, bishoprics, and fields. Every few hours, the coach pulls into an inn: horses are changed, passengers stretch their legs, the driver buys a drink from the landlord, and then the whole procession rattles off toward the next town.

One of those inns stood in the village of Buggenhout, in East Flanders, about halfway between Brussels and Ghent. It was called De Hoorn, The Horn, and it was run by a man named Pauwel Kwak. He had taken over the inn in 1791, and on the side he ran a small brewery out back, as many innkeepers did in those days. His beer was good enough to have its own local reputation, but what made Pauwel Kwak famous wasn't the beer, exactly. It was what he did about an annoying problem.

The problem was this: Napoleon's army, or the laws that followed in its wake, forbade stagecoach drivers from leaving their perch while on duty. Coachmen couldn't get down to enter an inn. They couldn't sit at the bar. They couldn't, in short, drink. And coachmen, who spent all day sitting on a bench in the weather, very much wanted to drink.

Pauwel Kwak looked at this bureaucratic inconvenience and saw a business opportunity. If the coachman couldn't come down to the glass, he would build a glass that could go up to the coachman.

The Glass That Hung on the Coach

Kwak commissioned, so the story goes, a glassblower to make a peculiar vessel. It had a bulbous bottom for holding beer and a long, slender tube rising above it, ending in a flared rim. The whole thing was useless on its own: you couldn't set it on a table because the bulb at the base had no flat foot. It only stood upright when seated in a wooden holder, ring-shaped, cradling the glass in place.

That wooden holder is the whole point. It was designed to hang from the side of a stagecoach (on the driver's perch, by a hook or a bracket) so that the coachman could sip his beer without leaving his seat. The glass tube let him tip it back with one hand while the other held the reins. The bulb at the bottom meant the coachman couldn't finish it in one go, which kept him upright through the drive. The wooden stand kept the whole contraption from clattering to pieces on the cobblestones.

That's the legend. Like most good beer legends, it is approximately half true and entirely worth repeating. The historical record gets blurry around the exact details: some historians argue the stirrup-cup shape predates Kwak and was adapted from older military or hunting designs. Others point out that the specific wooden-yoke-with-bulb-and-tube vessel we know as the Kwak glass doesn't show up clearly in documentation until the 19th century, possibly later. The version of the story we have today was polished and sharpened by generations of retelling, and then sharpened further by marketing.

But the core of it (an innkeeper on a coaching route, a regulatory obstacle to serving thirsty drivers, and a clever solution that became a brewing icon) feels true in the way that the best Belgian stories feel true. It's the kind of specific, practical, slightly absurd problem-solving that runs through Belgian beer history. And the glass is real. You can hold it in your hand. We'll pour you one.

From Inn Beer to Bosteels

The Kwak brewery at De Hoorn didn't survive the 19th century under that name. Family breweries rose and fell. By the time Pauwel Kwak the innkeeper was long dead, his recipe and his famous glass had been scattered to the wind. Or, to be more accurate, preserved in the memory of the local Flemish brewing community that never quite let a good story die.

The beer we know today as Pauwel Kwak is brewed by Brouwerij Bosteels, in the village of Buggenhout: yes, the same village where the original inn stood. The Bosteels family has been making beer in Buggenhout since 1791, which is not a coincidence. The brewery was founded by Evarist Bosteels in the same era as De Hoorn, and the two businesses operated alongside each other in the same small Flemish village for generations.

When Bosteels revived the Kwak name in the 1980s, it wasn't inventing history: it was picking up a thread that had been running through Buggenhout for two centuries. The beer was relaunched with its signature glass in its signature wooden stand, and the packaging leaned hard into the coaching-inn legend. Within a decade, Pauwel Kwak was one of the most recognizable Belgian beers in the world, largely because of that glass. You see it behind a bar and you ask about it. You ask about it and you end up ordering one. You order one and you end up with a story.

Bosteels is, for the record, the same brewery that makes Tripel Karmeliet, the three-grain tripel we wrote about in last month's Beer of the Week series. It's a small, seventh-generation family brewery that has carved out a remarkable position in the Belgian beer landscape by doing two things well: brewing rich, amber, malt-forward beers, and being smart about iconic glassware. In 2016, Bosteels was acquired by AB InBev, which raised eyebrows in beer circles, but the brewing operation in Buggenhout has continued relatively unchanged. The beer is still the beer. The glass is still the glass.

The Grain Bill and the Method

Pauwel Kwak is classified as a Belgian strong pale ale, though that category is a loose umbrella that does it only partial justice. The beer is 8.4% ABV, deeply amber rather than pale, and it leans harder on malt complexity than on hop character or yeast-driven esters. It's closer in spirit to a dark English strong ale than to a Duvel or a tripel: more Christmas cake than stone-fruit shimmer.

The grain bill is where Kwak earns its color and its sweetness. It's built on pilsner malt as the base, with substantial additions of Munich malt and caramelized specialty malts, the kind that go into Vienna lagers and Oktoberfest beers. Caramel malts of varying Lovibond levels layer in toffee, dried fruit, and the burnished copper hue that makes the beer look, in the right light, like held amber.

Belgian dark candi sugar plays a supporting role. Unlike the pale candi sugar used in tripels, the darker version brings caramel, raisin, and even faint licorice notes to the finished beer. It also boosts the alcohol without adding body, a Belgian trick that produces strong beers that are surprisingly drinkable, because the candi sugar ferments cleanly away rather than lingering as sweetness.

Hops are restrained. Bosteels uses noble European varieties. The specifics are house-secret, but the profile is classic continental: a gentle earthy, herbal bitterness that balances the malt without asserting itself. You don't drink Kwak for hops. You drink it for the other two sides of the triangle: malt and yeast.

The yeast is a proprietary Bosteels strain that produces the banana and spice esters that are Kwak's sensory signature. Fermentation is warm, which encourages the yeast to throw off those fruity, phenolic compounds. The beer is bottle-conditioned, meaning a second fermentation happens in the bottle itself, producing the fine carbonation that keeps the full malt body from feeling heavy. It's not quite as intensely conditioned as a Duvel or a Chimay, but there's enough prickle to lift the sweetness.

"Kwak is the beer that proves a glass can become as famous as what's in it, and then the beer has to rise to meet its glass." Belgian beer writer Tim Webb, paraphrased.

What's in the Glass

Pour a Kwak and the first thing you notice (assuming you can get past the glass itself, which is hard) is the color. Deep amber, a honey-on-polished-oak color with rose-gold highlights near the edges. The head is substantial, ivory, and tight; proper bottle conditioning gives it good retention, and as you drink, it laces the inside of the tube in that distinctive way only tall narrow vessels produce.

The nose is immediate and generous. Banana hits first (that's the yeast), followed quickly by rich caramel and toffee from the malt. There's ripe pear underneath, a touch of dried apricot, and a brown-sugar quality that's almost bakery-like. As the beer warms in the glass, more subtle notes emerge: a hint of licorice, a whisper of clove and white pepper, and the faintest suggestion of alcohol warmth that tells you this is a serious beer.

The first sip is a small revelation if you've only ever had pale lager or IPA. Kwak leads with sweetness, but it's a layered sweetness: caramelized sugar, banana bread, a touch of stone fruit. The malt body is full and silky. Then the yeast character asserts itself in the middle: banana again, a tickle of spice, a warm phenolic note that reminds you you're drinking a Belgian. The alcohol is there, but it's wrapped in enough malt richness that it doesn't feel hot or boozy. It just feels warming, the way a good glass of whiskey-laced coffee feels warming on a cold afternoon.

The mouthfeel is where Kwak really separates itself from lighter Belgian strong ales like Duvel. Where Duvel is dry, crisp, and almost champagne-like, Kwak is lush, coating, and full. The body is medium-to-full, with moderate carbonation that prickles pleasantly without scrubbing the palate clean. It sits on the tongue. It stays.

The finish is long and warming. Caramel and banana linger. A gentle bittersweet herbal note fades in, from the noble hops and the darker malts. There's a low-level alcohol warmth that travels from throat to chest in the way that well-made 8%+ beers do. You don't gulp Kwak. You sip it, and the sips stretch out, and a half-liter of it can occupy a pleasant hour in the right company.

Serve it around 45-50°F (7-10°C), cold enough to keep it refreshing, warm enough to let the malt complexity express itself. Too cold and you're drinking a sweet amber that seems simpler than it is. Let it warm a few degrees and the whole architecture reveals itself.

The Glass, Seriously

Let's talk about it properly. The Kwak glass is a 33cl vessel shaped like a slender-stemmed laboratory flask someone tried to redesign as a trophy. The bulb at the bottom holds most of the beer. The long cylindrical tube rising above it acts as both spout and chimney, collecting aromatics on the way to your nose, directing foam cleanly as you tip the glass back. The flared rim is designed to glide across your lips without spilling when the glass is held at the steep angle the shape requires.

It does not stand up on its own. It can't. That's the whole concept. You receive your Kwak in a wooden holder (a circular yoke set on a flat wooden base, sometimes clamped, sometimes loose) and the glass sits cradled in the ring. The stand is part of the serve. You do not remove the glass from the stand and set it on the table. You do not, under any circumstances, try to set the bulb directly on the table. It will tip. You will look foolish. The beer will end up on your shoes.

Drinking from it is an exercise in coordination the first time. You have to tip the stand carefully, so the glass rotates but the stand stays in your hand. At steep angles, the beer in the bulb rushes through the narrow tube and arrives in your mouth faster than you'd expect. Most first-timers end up with a foam mustache. This is part of the experience and we will not judge you for it.

A note on the great Kwak tradition that may or may not be authentic: at many Belgian bars, when you order a Kwak, the bar will hold onto one of your shoes as collateral against the glass. The glasses are expensive to replace and, because they can't stand up on their own, they're unusually easy to knock over and break. The shoe-hostage tradition is half prank, half genuine security deposit. We don't take shoes at Mort Subite (Austin summers make this logistically unwise), but we'd be lying if we said we didn't think about it.

At the Table

Kwak's rich caramel-and-banana profile makes it a natural partner for dishes that lean savory-sweet. The classic Belgian pairing is with stoofvlees, the brown Flemish beef stew that uses dark beer in the braise. A stew cooked with Kwak (or another amber strong ale) and served alongside a glass of the same is one of those pairings that feels like it's been refined by a thousand winter dinners in a thousand small Flemish kitchens, because it has been.

The malt sweetness also loves aged cheese, particularly nutty, crystalline varieties like two-year Gouda or Comté. The caramel in the beer meets the tyrosine crystals in the cheese and something almost dessert-like happens. Add a dab of fig jam and you've reproduced a Belgian cheese plate so perfectly that only a Brabant grandmother could improve it.

For dessert, Kwak is a genuine sleeper pairing. Its banana-caramel-toffee character is practically a flambéed dessert already. Pair it with bananas Foster, sticky toffee pudding, or a simple piece of dark chocolate with sea salt and you'll end the meal convinced that dessert beers are the most underused category in the American drinks landscape.

How We Serve It at Mort Subite

At Mort Subite, Kwak gets the proper treatment: the 33cl Bosteels Kwak glass in its wooden stand, a slow pour that respects the substantial head, and a temperature around 48°F, cool enough to be refreshing against Austin weather, warm enough to let the malt and yeast do their work.

We love serving Kwak because it's the beer that teaches people something. The glass alone starts a conversation: we've watched entire tables pause what they were doing to watch a first-time Kwak drinker figure out the physics of drinking from it. The beer itself then does the rest of the work. It's approachable enough that a wine drinker or a cocktail person will understand what's happening in the glass, but it's distinct enough that even seasoned beer nerds find new things in it. The banana-caramel interplay is unique. The 8.4% alcohol sneaks up on you honestly, not as a stumble but as warmth.

If you've only had Kwak somewhere that served it in a regular tulip (or worse, in a pint glass), you've had a shadow of the experience. The glass matters. Not because it changes the chemistry of the beer (though the long tube does funnel aromatics in a distinctive way), but because the ritual of the stand, the careful tipping, the stretched-out sipping, changes your relationship with what you're drinking. You pay attention. You slow down. You notice things.

That's the real Pauwel Kwak trick, two hundred and thirty-some years on from the original innkeeper and his clever glassblower. He didn't just build a workaround for a Napoleonic labor regulation. He built a ritual. And rituals are how beer, or anything worth doing well, gets remembered.

Pauwel Kwak is served at Mort Subite in the proper glass and stand. Come see why a coachman's workaround became a Belgian icon.