Mushroom powder is a dehydrated, milled ingredient produced by drying whole or sliced mushrooms to a low moisture content and grinding them to a defined particle size, valued in food manufacturing as a natural flavouring and umami source.
In trade practice
Suppliers dry mushrooms using hot-air tunnel or belt dryers before milling; the drying stage is critical because residual moisture above the specification limit promotes caking and microbial growth during storage. Particle size is verified by sieve analysis and reported in mesh sizes on the certificate of analysis. Microbiological testing covers total viable count, yeasts, moulds and, where required by the buyer, absence of specific pathogens. Species authenticity is increasingly verified by DNA-based methods, particularly where porcini or shiitake powders command a premium, to guard against substitution with lower-value species.
In a specification
A specification for mushroom powder should state moisture content limit, water activity limit, particle size distribution by mesh, microbiological standards, and the species or species blend, with authenticity verification method named where relevant.