Malt
Malt is cereal grain—most often barley, but also wheat, rye, oats, corn, or rice—that has been germinated in water and then dried with heat to arrest sprouting. This controlled germination develops enzymes that convert the grain's starches into fermentable and flavorful sugars, chiefly maltose, making malt the foundational source of sweetness, color, body, and fermentable material in a vast range of drinks.
How malt is prepared
Malt provides fermentable sugar for brewing beer and distilling whisky, is concentrated into malt extract and barley malt syrup as sweeteners and flavorings, forms the base of malted milk powders and hot bedtime and breakfast drinks, and is fermented further into malt vinegar.
Other preparations
MURI’s EU ingredient lists captured in May and June 2026 name wheat malt (gluten); the US list captured in September 2026 names barley malt (gluten). Malt is common to both accounts. The difference has not been established as a recipe or market change, and neither grain is asserted for every bottle.[8][9]
In depth
Ancient origins in grain brewing
The practice of malting grain reaches back to the earliest civilizations that learned to turn cereals into drink. Germinated grain was almost certainly a component of beer in ancient Egypt, Sumer, and early China, where malting or the chewing of grain served to convert starch into fermentable sugar. The key insight was simple but transformative: soaking grain until it sprouts, then drying it, awakens natural enzymes that break down the grain's stored starch into sweeter, more fermentable sugars. Barley emerged as the favored grain both for its abundance of these enzymes and for the fibrous husk that shields the sprouting embryo and later helps filter the mash. This ancient step remains the technical foundation of nearly every malt-based beverage made today.[1]
Beer: malt as the backbone of brewing
Beer is the oldest and most widespread malt beverage, and malted barley is its defining ingredient. In brewing, cracked malt is steeped in hot water in a process called mashing, during which the enzymes developed during malting cleave the remaining starch into fermentable sugars that dissolve to form a sweet liquid known as wort. Yeast then ferments this wort, producing alcohol and carbonation. The malt determines much of a beer's strength, color, and flavor: pale base malts supply most of the fermentable sugar, while specialty malts kilned or roasted to varying degrees add caramel, amber, chocolate, or near-black tones and corresponding depths of flavor. Other grains such as wheat, rye, oats, and corn are also malted or used as adjuncts, but barley malt remains central, its role even enshrined in historic purity laws that limited beer to water, hops, and barley malt.[2]
Whisky and the distiller's malt
Whisky carries malt from the brewhouse into distillation. To make it, grains are malted—soaked, allowed to germinate, then halted by drying with hot air, a step known as kilning—so that their starches can be converted to sugar during mashing. The resulting wort is fermented into a beer-like liquid called wash or distiller's beer, which is then distilled and aged in wooden casks. In Scotch whisky tradition, the drying malt is heated over burning peat, lending the finished spirit its characteristic smoky note. Single malt whisky, made entirely from malted barley at a single distillery, is one of the most celebrated expressions of the ingredient, though many whiskies also use unmalted grains alongside malt or rely on added enzymes. The word itself echoes this heritage, with early Scottish records noting malt sent to a friar to make aqua vitae.[3]
Malt vinegar and the fermented grain condiment
Where fermented malt liquor is allowed to sour, malt vinegar results. Historically known in England as alegar, it is made by malting barley so its starch becomes maltose, brewing an ale from that sugar, and then letting the ale undergo a second fermentation in which acetic acid bacteria convert the alcohol into acetic acid. The aged result is a light-brown vinegar with a distinctly malty character. Malt vinegar developed as a regional English tradition and became the classic accompaniment to fish and chips, as well as a familiar seasoning for fried potatoes in Britain and Canada. It stands alongside grain-based vinegars from other cultures—including the complex, malty Chinese black vinegars made from rice, wheat, millet, and sorghum—as a beverage-derived product born of malt's fermentability.[4]
Malt extract and barley malt syrup as sweet concentrates
Malt need not become a finished drink to shape beverages; concentrated forms of it flavor and sweeten many products. Malt extract is made by mashing malted grain to release its sugars and then evaporating the wort into a thick, treacle-like syrup or drying it into a powder. Liquid and dry malt extracts are staples of brewing, especially for home brewers, and the syrup form is valued for its rich malty taste. Barley malt syrup, extracted from sprouted malted barley, is an unrefined sweetener roughly half as sweet as white sugar, dominated by maltose. It has a long history: classic Chinese texts describe extracting malt syrup and maltose from household grains more than a thousand years ago, and it remained one of the primary sweeteners in China for centuries. Today such extracts add malt flavor and color to malted drinks, cereals, and confections.[5]
Malted milk and the rise of the malt drink
In the late nineteenth century malt entered an entirely non-alcoholic realm through malted milk. This powder, combining malted barley, wheat flour, and evaporated milk, was originally developed as a nutritional food for infants and invalids before finding unexpected popularity as a beverage in its own right. Mixed with milk, and later blended with ice cream, it became a fixture of soda fountains and lent its name to the malt shop and the malted milkshake. Its nourishing, portable qualities also made it a favorite of polar and mountaineering expeditions. Malted milk established a template for a whole family of powdered malt drinks enjoyed hot or cold across the world.[6]
Malted hot drinks across modern cultures
The malted milk idea evolved into a category of sweet malted hot-drink powders that are now consumed globally, with strikingly different cultural roles from place to place. Made from malt extract blended with milk solids, sugar, and sometimes cocoa, these drinks are stirred into hot or cold milk or water. In Britain such malted drinks are traditionally taken before bed as a soothing evening beverage, while in India the same style of malt drink is embraced as a family and breakfast nourisher, where it enjoys enormous popularity and appears in numerous flavors from malt to chocolate and cardamom. In Hong Kong, malted drinks are café staples served hot or over ice, and in parts of Africa they are stirred into milkshakes. Chocolate-forward malted versions have become especially widespread, showing how a single ancient ingredient continues to anchor beloved contemporary beverages.[7]
References
- [1]EncyclopediaMalt — Wikipedia↑§1
- [2]EncyclopediaBeer — Wikipedia↑§2
- [3]EncyclopediaWhisky — Wikipedia↑§3
- [4]EncyclopediaVinegar — Wikipedia↑§4
- [5]EncyclopediaBarley malt syrup — Wikipedia↑§5
- [6]EncyclopediaMalted milk — Wikipedia↑§6
- [7]EncyclopediaHorlicks — Wikipedia↑§7
- [8]Producerhttps://muri-drinks.com/en-eu/products/passing-clouds↑prepared
- [9]ProducerMURI — Passing Clouds, US page, retrieved 5 September 2026↑prepared