Key takeaways:
- Enzymes are being tested as a targeted way to reduce bitterness in industrial bread by modifying flavour at source rather than masking it with added ingredients.
- Early trials show consistent reductions in perceived bitterness, but limited public data and lack of independent validation mean the approach is still being proven.
- While not a replacement for fermentation, enzyme systems offer a scalable option for improving flavour within the time and cost constraints of industrial baking.
Manufacturers are being pushed in multiple directions at once – to cut sugar, simplify labels, extend shelf life, speed up throughput. Each makes sense in isolation. Together, they’re creating products that tick every technical box, but can end up losing something in taste – or even picking up something slightly off.
That trade-off is most obvious in industrial bread. Preservatives, fibre enrichment and alternative grains all play a role in today’s formulations, but they can leave behind bitterness or dull, flat notes. At the same time, shorter processes mean less opportunity to build flavour naturally. On today’s fast-paced production floors, there’s simply less time to develop it – and less room to hide what’s missing.
“There’s a growing tension between process efficiency and flavour quality,” says Roman Gradert, a trained master baker who now leads research and development at DeutscheBack, part of the Stern-Wywiol Group. “The industry has optimised production, but in doing so, it’s exposed new sensory challenges – especially in preserved products like sandwich and toast breads.”
Across large-scale operations, the question is no longer whether flavour’s being affected, but how to rebuild it without reversing the gains made elsewhere. That’s where enzymes – long used for structure and stability – are starting to be looked at differently.
While enzymes have long been part of the bakery toolkit, their deliberate use to influence flavour – rather than just texture or shelf life – is only just gaining traction in commercial settings. What’s changing isn’t the enzymes themselves, but how they’re being used. Rather than relying on indirect effects from fermentation or dough development, manufacturers are starting to test whether enzymes can be applied more deliberately to influence flavour – targeting specific issues such as bitterness at a biochemical level.
Much of the current momentum is being driven by ingredient suppliers, which means the approach is still being validated as it moves from controlled trials into broader industrial use.
Cracking the bitterness challenge
Bitterness has long been part of bakery formulation, but in industrial bread it’s becoming harder to ignore – not because it’s new, but because the conditions that amplify it are now more common.
“In preserved bakery products, bitterness is a known issue,” Gradert says. “It’s not always dominant, but it can affect overall perception.” The problem, he adds, is particularly visible in products using propionate-based systems, where off-notes can sit just below the surface. Not enough to be rejected outright, but enough to shift how the product is experienced.
Enzymes are already widely used to improve the texture and shelf life of baked goods, but their role in flavour has, until recently, remained largely indirect. What’s now being explored is whether that gap can be addressed more deliberately.
Gradert points to internal and customer trials suggesting enzyme systems can reduce perceived bitterness, in some cases by up to 62%. While promising, such figures are based on controlled sensory evaluations rather than independent validation, and detailed datasets remain undisclosed.
“We used structured sensory evaluations across different panel types,” he explains. “Internal experts, external customer panels and, in some cases, consumer panels.”
The work focused on yeast-raised baked goods – mainly sandwich and toast breads – comparing standard formulations with enzyme-treated versions. Panellists assessed differences using descriptive profiling rather than simple preference testing. “What stood out was the consistency. We saw similar effects across different applications and panel groups.”
That said, the data isn’t fully open. Some of it comes from commercial projects, and there’s been no formal third-party validation. “We can’t publish detailed datasets,” acknowledges Gradert. “But the repeated observations across different environments give us confidence in the effect.”
What’s happening at a technical level is less about masking flavour and more about shifting how it’s built. The system relies on hydrolytic enzymes – particularly peptidases – that act on proteins during dough development. These enzymes break proteins into smaller peptides and free amino acids, some of which are directly linked to taste perception.
Certain peptide fractions are associated with bitterness. Breaking them down reduces their impact. At the same time, amino acids such as glutamine and others linked to savoury perception become more available. “The aim isn’t to add flavour. It’s to change how existing components are expressed.”
There’s also a secondary effect during baking. The increased pool of amino acids feeds into Maillard reactions – the chemistry responsible for crust colour and much of bread’s characteristic aroma. More available precursors can mean a fuller, more rounded flavour profile, even without changing the base formulation.
In some trials, that translated not just into reduced bitterness, but into bread that was described as more balanced overall – not simply less flawed. Taken together, the results suggest enzymes can meaningfully reduce bitterness in certain industrial applications – but they’re not a universal fix, and performance will depend heavily on formulation and process.
Clean label, cost and scalability
Whether that holds up outside controlled trials depends on how easily the approach fits into real production environments.
Labelling is the first checkpoint. “Regulatory positioning always needs to be assessed case by case,” Gradert says. “It depends on the market and the formulation.” In this system, calcium sulfate used as a carrier may require declaration, but beyond that, outcomes vary across regions.
From a clean label standpoint, enzymatic systems sit somewhere between technical and intuitive. They’re not visible to consumers in the same way as flavourings or additives, but nor are they simple. “The advantage is that we’re not introducing additional flavour ingredients. We’re working with what’s already in the dough.”
That can support cleaner positioning, but it’s not a universal solution. “Final labelling always depends on the full formulation and local regulations,” adds Gradert.
Where the argument becomes more tangible is in process efficiency. Traditional ways of correcting flavour – longer fermentation, malt extracts, added flavour systems – tend to come with trade-offs. Fermentation takes time. Flavourings must be declared. Malt extracts can affect formulation balance. “Enzymes offer a way to work within existing production constraints. They can help compensate for shorter processes while maintaining flavour.”
That especially matters in high-throughput plants. Extending fermentation isn’t always an option, even if it would improve flavour. A system that works within current timelines is easier to adopt.
From a technical standpoint, integration is relatively straightforward. Enzyme systems are typically supplied as powder blends and can be incorporated into dough without changes to equipment or process flow. Dosage levels are low – often in the range of 0.05%-0.15%, depending on the desired effect and product type.
Cost, however, is less clear-cut. “It depends on dosage, application and what you’re trying to achieve, but when you compare it to other options, there’s often a positive economic case.”
Whether that holds consistently across different formulations and production environments is still being tested. There are also secondary effects that could influence that calculation. Trials have pointed to slower crumb firming during storage and the possibility of reducing added sugar or emulsifiers, although these outcomes are more variable and still being explored.
Complementing fermentation
If enzymes are gaining attention, it’s not because fermentation has lost its role. “This isn’t about replacing fermentation,” emphasises Gradert. “Sourdough and long fermentation are still very effective for flavour development.”
Where enzymes fit is in the gap created by industrial constraints – where time, cost or formulation limits what can be achieved through process alone. “They’re most effective in applications where flavour is limited by short processes or specific ingredients.”
That gap is most visible in products produced at scale, such as sandwich bread, burger buns and other yeast-raised goods. In contrast, products that rely heavily on fermentation – baguettes, ciabatta, artisan breads – show less benefit. “In those cases, the additional impact is limited,” Gradert acknowledges.
The more interesting direction may lie in combining the two. Enzymatic hydrolysis and fermentation both generate flavour precursors, but through different mechanisms. Used together, they could offer more control over how flavour develops, particularly in hybrid production systems that sit between industrial and artisanal models.
“Both contribute in different ways. That opens up possibilities for further optimisation.”
For now, enzymatic flavour design remains a targeted tool rather than a universal fix. It works best where modern production has created a sensory gap that traditional methods can’t easily close.
Whether enzymes can fully close industrial bread’s ‘bitter gap’ remains uncertain. Early results suggest they can reduce bitterness and improve flavour balance in specific applications, particularly where preservatives and short processes are involved. But performance varies, independent validation is still limited, and the approach is only just moving beyond controlled trials. What is evident, however, is that the industry is starting to look beyond adding flavour and towards controlling how it’s built in the first place.
