Hop Horizons

Crooked Stave

Crooked Stave is a Denver brewery whose reputation was built on wild fermentation, oak ageing and an unusually scientific interest in the microorganisms behind complex beer. At a time when much of American craft was locked in a race to produce ever-more-bitter IPAs, Crooked Stave helped drag Brettanomyces, mixed cultures and long maturation into the centre of the modern beer conversation.

The brewery was founded in late 2010 by Chad Yakobson, who studied brewing and distilling in Edinburgh and completed extensive research into Brettanomyces before starting out. He later made that work public through the Brettanomyces Project, helping brewers understand an organism that had historically been seen as either a source of fascinating complexity or an unwanted contaminant.

That background gave Crooked Stave an identity rooted in genuine technical knowledge rather than fashionable farmhouse references. Its beers explored how yeast, bacteria, fruit, hops, time and different forms of oak could interact, often through multiple stages of fermentation and maturation.

Brettanomyces was central to the early work. Depending on the strain and conditions, it can throw out citrus, stone fruit, hay, leather, earth or the more divisive territory of barns and livestock. Crooked Stave showed these characteristics could be controlled and integrated rather than left as accidental wildness.

Oak was the other defining element. Beer was fermented or conditioned in barrels and big wooden foeders, where oxygen, microorganisms and time slowly transformed it. Wine barrels brought fruit, tannin and vinous acidity; bourbon barrels added vanilla, spirit and deeper sweetness.

The resulting beers were often tart, dry and quietly complex rather than aggressively sour. The best balanced acidity with grain, fruit and oak, keeping each element distinct without the beer ever feeling fragmented.

Surette Provision Saison became one of the most representative releases – a rustic farmhouse ale matured in wood, combining citrus, grain, herbs and earthy fermentation with restrained acidity. Variations with fruit, spices or seasonal ingredients showed how a fairly simple base beer could anchor countless expressions.

St. Bretta explored the relationship between Brettanomyces and citrus, with different editions using varieties of oranges and other citrus fruit. The results were full of peel, pith, juice and dry fermentation character – intensely aromatic yet lighter and more refreshing than many American sours.

Origins went darker. Inspired by Flanders red, it used a lager-derived base before extended ageing in foeders and wine barrels. Dark fruit, caramel malt, oak and controlled acidity produced something reminiscent of the Belgian classics without simply copying them.

Fruit has mattered enormously across the range. Peaches, raspberries, cherries, blueberries, plums and passion fruit have all been used to drive secondary fermentations or deepen existing sours.

The strongest releases make the fruit taste fermented rather than merely added. Sweetness falls away, acidity sharpens, and the ingredient becomes more vinous, earthy or concentrated – a peach beer suggesting skins, stones and dry white wine rather than peach juice or sweets.

Crooked Stave also became known for pairing hops with wild fermentation. The Hop Savant series set varieties like Citra, Amarillo and Galaxy against Brettanomyces, bringing citrus and tropical fruit into contact with funk, dryness and acidity.

It's a difficult balancing act. Fresh hop aroma fades quickly, while Brett and barrel character keep changing over time. The most successful beers caught the brief window where both stayed vivid; weaker examples could turn harsh, disjointed or punishingly dry.

Not everything they make is sour. As the brewery grew, the range broadened into cleaner lagers, pales and other conventional styles. It made commercial sense as enthusiasm for intensely sour beer became less predictable – though it inevitably made the identity less singular.

Crooked Stave remains most compelling when fermentation and maturation are the point. Plenty of breweries can make a competent lager or hazy IPA; far fewer have the accumulated cultures, cellar knowledge and patience needed for complex mixed-fermentation beer.

The approach has its challenges. Sour beer is inherently variable, and bottles or batches differ with age and storage. Acidity that feels lively to one drinker can feel punishing to another, and Brett flavours can slide from elegant earthiness to something considerably more animal.

Older bottles aren't automatically better, either. Fruit fades, carbonation weakens, and gentle oxidation can eventually swamp the fresher qualities. These beers reward thoughtful cellaring – but they also prove maturation is a transformation, not a guarantee of improvement.

The elaborate production inevitably shows up in the price. Fruit, barrels, extended storage and the risk of a failed batch all make these beers dearer than quickly turned-around pale ale. They're best approached as bottles to share and study rather than uncomplicated everyday drinking.

The presentation has always reflected that mix of rusticity and precision – labels evoking orchards, farms and old European brewing, wrapped around carefully blended products of controlled fermentation and laboratory understanding. The contrast is fitting: Crooked Stave may celebrate wild organisms, but its best work is anything but careless.

The brewery holds an important place in American craft beer. It didn't invent sour or mixed-fermentation brewing, and its methods draw openly on much older Belgian traditions – but its achievement was interpreting those ideas through modern microbiology and making them visible to a generation of American drinkers and brewers.

The market has moved on since Crooked Stave first made waves. Heavily fruited kettle sours now deliver instant sweetness and acidity without years in barrels, and many drinkers have drifted back to lager, pale ale and simpler styles. Slow, dry, challenging mixed-fermentation beer no longer commands the excitement it once did.

Which makes the specialist knowledge more valuable, not less. The finest Crooked Stave beers offer flavours that can't be faked by tipping fruit purée and lactic acid into a young base beer. They have the depth, dryness and gradual development that only come from organisms working over time.

It's not the easiest brewery to love consistently. Some releases demand patience, others divide opinion, and individual bottles can evolve unpredictably. But that uncertainty is inseparable from the fascination.

At its best, Crooked Stave shows beer as a living collaboration between brewer, wood, fruit and microorganisms. It helped turn Brettanomyces from a mysterious brewing fault into a deliberate creative tool, and produced some of America's most thoughtful wild and sour beer.

For anyone interested in fermentation rather than flavouring alone, this remains an essential brewery.

Beers (and other) Brewed by Crooked Stave

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