Fermentation turns up the heat in snacks

Key takeaways:

• Fermentation is helping snack makers move beyond one-note chilli heat by adding tanginess, acidity, smokiness and savoury depth to flavour profiles.
• As demand grows for clean label, vegan and non-GMO products, fermented ingredients are increasingly being used to deliver both flavour and functionality.
• Fermentation-derived ingredients such as yeast extracts can help manufacturers reduce sodium while maintaining the taste consumers expect.

At Snackex 2026 in Lisbon, Portugal, fermentation kept cropping up in conversations about flavour innovation, clean label reformulation and where snack development is heading next. Once largely associated with foods such as kimchi, sauerkraut and sourdough, the age-old process is increasingly being viewed as a way to tackle some of the industry’s most pressing formulation challenges.

Manufacturers are under pressure from multiple directions. Consumers want bolder flavours, retailers want cleaner labels, regulators continue to focus on sodium reduction, and brands are looking for ways to stand out in an increasingly crowded snack aisle. Traditional fermentation is emerging as one of the few tools capable of addressing several of those demands simultaneously.

Consumer demand is changing, too. Hot and spicy flavours remain one of the strongest trends in snacks, but manufacturers say consumers are no longer satisfied with one-note chilli heat. They increasingly want layered flavour experiences that combine spice with tanginess, acidity, smokiness, savoury depth and culinary authenticity.

Fermented ingredients are increasingly finding their way into those conversations because they can deliver exactly the kind of complexity consumers are seeking while also supporting clean label, vegan and non-GMO formulation strategies.

Consumers want more than just heat

Spicy snacks continue to gain momentum, fuelled by everything from Nashville hot and Korean-inspired flavours to fermented chilli sauces and social media-fuelled heat challenges. Yet manufacturers say the most successful products are no longer those that simply deliver maximum burn.

Today’s consumers expect heat to be accompanied by acidity, tanginess, smokiness and savoury depth, creating a more sophisticated flavour experience.

“The fermentation taste profile and the needs from the customers and the demand for these products are increasing,” says Florian Much, senior market and technical service manager at Ohly.

The Hamburg-headquartered ingredient supplier has seen particularly strong interest in fermented hot sauce powders designed to bring the complex flavour profiles of hot sauces into dry snack applications. Its Prodry hot sauce range, for example, is made from original chilli peppers such as jalapeño, chipotle and cayenne peppers that are fermented before being converted into powder. The range also includes vinegar-, mustard-based and lemon/lime powders that can be incorporated into seasonings, coatings and snack blends.

Much says the attraction is the additional flavour complexity fermentation delivers. “It’s more than just a ground red jalapeño or a ground chipotle,” he says. “Since it’s a fermented sauce, it comes with those fermented notes, tanginess, acidity, so it’s a more complex flavour profile you can achieve with this.”

Snack brands aren’t simply chasing heat anymore. They’re chasing the kind of flavour complexity consumers increasingly associate with restaurant dishes, craft condiments and globally inspired cuisine.

Much says customers aren’t only looking for spicy flavours but are increasingly seeking products with ‘more complex layers’ of flavour. The trend is visible across global markets and is influencing everything from potato chips and tortilla snacks to extruded products and savoury seasonings.

Social media has undoubtedly helped accelerate consumer interest in heat, but Christine Schwarz, applications scientist lead at Ohly, believes the trend has evolved beyond simple chilli challenges.

“I think that’s also a huge driver of that trend,” she says. “In Europe, or in Germany at least, when you read spicy seasoning on a chip, I was always disappointed because it’s not really spicy. But now we are getting there.”

Restaurants have also helped raise expectations. Many chefs now use fermented ingredients to create signature flavour profiles, introducing consumers to the tangy, savoury and acidic characteristics that fermentation can deliver.

“In most of the top restaurants, they are using fermented specific notes,” says Much. “They have their own fermented products, which they are using for giving a specific fingerprint and taste profiles to their dishes.”

As those flavour trends migrate from foodservice into retail, snack producers are increasingly exploring how fermented ingredients can help recreate similar complexity in scalable consumer products.

Clean label, naturalness and consumer trust

Flavour may be grabbing the headlines, but it’s only part of fermentation’s appeal.

Consumers are paying closer attention to ingredient lists and questioning how food is made. At the same time, manufacturers are under growing pressure to deliver products that feel authentic, recognisable and less heavily formulated.

“There is this craftsmanship and it’s an old tradition, like sauerkraut,” says Schwarz. “Fermentation checks that box.”

Although modern fermented ingredients are produced at industrial scale, they still draw on processes consumers recognise and understand. Brands attempting to balance functionality with transparency are increasingly drawn to ingredients that carry those associations.

Much believes fermentation carries a level of trust that many modern ingredients struggle to achieve. “It gives more trust in the product, more origin or provenance, more natural touch.”

Unsurprisingly, that conversation soon turns to ultra-processed foods (UPFs). “We need to make a hard split between processing and the label declaration,” says Much.

He argues that ingredients shouldn’t be judged solely by their level of processing, but also their purpose in product and the value they provide.

“Everything, even the most natural product, needs some form of processing,” adds Schwarz. “You can’t just shove all those products under one belt and say they’re bad.”

It’s a debate unlikely to disappear anytime soon. Consumers want cleaner labels and recognisable ingredients, while manufacturers still need products that deliver on flavour, texture and shelf life. Fermented ingredients are increasingly finding a place in that conversation because they can support clean label, vegan and non-GMO positioning without asking brands to compromise on taste.

Fermentation’s role in sodium reduction

Salt reduction remains one of the food industry’s most persistent challenges. Public health targets continue to push manufacturers towards lower sodium formulations, yet consumers remain reluctant to compromise on flavour. Reducing salt is relatively straightforward; maintaining the same sensory impact is considerably harder.

Much believes fermentation-derived ingredients can help close that gap. “One of the best tools to go to the sodium reduction world is yeast-based ingredients.”

Yeast-based ingredients have long been used to build savoury flavour and umami, but their role in sodium reduction is attracting renewed attention as manufacturers search for alternatives to simple salt replacement strategies.

According to Schwarz, the interaction between umami compounds and salt perception creates opportunities to maintain flavour intensity even when sodium levels are reduced.

“Yeast-based ingredients can play a role in salt reduction because we are playing with the taste buds and umami and salt receptors are lying next to each other,” she says. “It keeps the channel longer open, so you can perceive the salt longer.”

The challenge is especially acute in snacks, where flavour remains one of the strongest drivers of repeat purchase across categories ranging from crisps and crackers to extruded snacks and savoury biscuits.

“If you take out the salt, you don’t have a tasty product anymore,” Schwarz says.

Manufacturers therefore find themselves looking for smarter reformulation tools. Fermentation-derived ingredients offer one possible route, helping create savoury depth and extend flavour perception without relying solely on sodium.

Fermentation isn’t about to replace protein, fibre or plant-based innovation as the industry’s favourite talking point. Yet few ingredient technologies currently touch so many of the issues keeping snack developers awake at night.

Heat is evolving into complexity. Sodium targets aren’t going away. Consumers continue to scrutinise ingredient lists, while clean label, vegan and non-GMO positioning remain firmly on product development agendas.

Fermentation won’t solve every one of those challenges, but it’s increasingly helping manufacturers tackle several of them at once. Judging by the conversations taking place on the show floor at Snackex, that’s precisely why the technology is attracting so much attention.