Dosed by the gram, malt corrects flours, feeds the yeast and browns the crust. What germinated grain brings to bread, and how bakers put it to work.
Break a country loaf in two and look at the crust: that deep golden brown, close to mahogany in places, doesn't come from the oven alone. It also comes from the sugars the dough managed to build during fermentation — and for that, many bakers lean on a quiet ingredient, dosed at one or two grams per hundred grams of flour: malt. In the brewhouse, malt is the backbone of beer. In the bakehouse, it works backstage. It is one of the oldest aids in breadmaking, and one of the least known to the people who eat the bread.
A germinated grain is a grain with tools
Malting doesn't transform the grain, it wakes it up. At the maltings, barley is steeped, germinated for a few days, then dried gently on the kiln. During germination the grain builds enzymes — amylases above all — whose natural job is to cut starch into sugars to feed the coming seedling. The maltster stops that work at the right moment: the starch reserves are still there, and so are the enzymatic scissors. Ground into flour, that germinated grain gives the baker exactly what it gives the brewer: starch made accessible, and the tools to cut it.
The difference is a matter of temperature. Dried gently, around 80 °C at the end of kilning, malt keeps its enzymes alive: this is diastatic malt. Pushed higher, it loses most of that activity but gains aromas of crust, biscuit and milky coffee: non-diastatic malt, chosen for flavour and colour. Both have their place in the bakehouse, and they do different jobs.
Diastatic malt: a flour corrector
No two harvests give the same flour. Wheat brought in after a dry season can be short on enzyme activity — millers measure it with the Hagberg falling number. Too high, and the dough runs out of sugars: the yeast idles, the crust stays pale, the crumb dries out fast. A pinch of diastatic malt flour — often 0.1 to 0.5% of the flour weight — restarts the machine: amylases free up maltose, the yeast feeds on it, fermentation picks up again.
You can see and smell the effect. More residual sugars at baking time means a crust that colours boldly through Maillard reactions and caramelisation, a cleaner roasted note when the loaves come out, a slightly softer crumb. Viennoiserie gains too: plenty of croissant recipes owe their deep tan to a few grams of malt.
Non-diastatic malt: colour and flavour
When flavour is the goal, the kiln runs hotter. A malt kilned warmer, munich-style, or a darker malt flour brings hardly any enzymes, but all the more taste. In a brown loaf, a seeded bread or a beer bread, two to five percent of malt, as flour or cracked grain, gives notes of toast and hazelnut, a darker crumb, and that gently sweet roundness familiar from amber beers. Some bakers soak the cracked grain overnight, like a seed soaker, so the kernels turn up whole and tender in the crumb.
The forms it takes in the bakehouse
Three forms cover most needs. Malt flour, pale or dark, can be weighed to the gram and blended into the bread flour. Malt extract — a thick syrup made by concentrating a wort — sweetens and colours at once; it is what you taste in many sandwich loaves. And whole or cracked malted grain, flakes included, brings texture to multigrain breads. A fresh pils malt, chewed on its own, already tastes of mild cereal and fresh hazelnut: the same grain ends up on the crust of a seeded loaf.
When malt is not the answer
A good flour often needs nothing at all. If the miller has already corrected the grist — many do, precisely with malt — adding more only weighs the dough down. Overdosing diastatic malt is in fact the most common fault: too much amylase, and the starch is cut up until the crumb turns gummy and the dough slackens and fights the shaping. Malt is a precision tool, not a miracle ingredient. And for very dark breads, pumpernickel-style, the work is done by roasted malt — a roaster's product we don't make in Dinant: our range stops at base malts and munich- or vienna-style malts.
Belgian organic malt for the bakeries nearby
An organic bakery needs organic ingredients — malt included. That is a regulatory given, but not always a practical one: organic malt flour often travels a long way. In Dinant we malt organic Belgian malting barley, dried without fossil fuels, in five-tonne batches; the first batches of the campaign leave the drum this autumn. An organic pils or pale ale malt, milled at the bakery, makes a first-hand diastatic flour; a munich brings the colour. For a baker in Namur, Maastricht or Trier, it is an ingredient from next door, with a face behind it.
If you bake — sourdough on Sundays or a shop oven every morning — and malt has caught your curiosity, the door of the maltings is open. Come watch the grain germinate in Dinant, or write to the malthouse team through mad.be: talking bread and malt is part of the job.