Description
Food waste in the brewing industry
Technical
Brewer's spent grain (BSG) or draff is a food waste that is a byproduct of the brewing industry that makes up 85 percent of brewing waste. BSG is obtained as a mostly solid residue after wort production in the brewing process. The product is initially wet, with a short shelf-life, but can be dried and processed in various ways to preserve it.
Science
Primary Reaction
Maillard Reaction
Sensory Profile
Aroma ()
maltytoastynuttyearthycaramel-like
Wine Analogy
Similar to the lees in winemaking, contributing body and complexity
Coffee Analogy
Resembles coffee grounds in texture and some aromatic qualities
Perfume Analogy
Earthy base note like vetiver or patchouli
Culinary Applications
Drachenfutter (Germany)Traditional Bavarian bakingAdds fiber and nutty flavor to breads
Okara-kinako (Japan)Japanese fermentation traditionUsed similarly to soybean okara in condiments
Brewer's grain porridge (Scotland)Historic Highland cuisinePrimary starch source in traditional gruels
Dietary
VeganVegetarianHalalKoshergluten
Molecular Pairing
Key Compounds Produced
MaltoseDextrinsMelanoidins2-Methyl-1-propanol3-Methyl-1-butanol