Quick answer: Bouillon, stock and soup-base powders are salt- and fat-heavy, which makes them among the most deliquescent food powders — they draw moisture and cake or turn pasty at modest humidity. A food-grade fiber desiccant sized to the tub, pouch or bulk sack holds humidity below that threshold, adsorbing more than 35% of its weight at RH50, dust-free. It is compostable and FDA food-contact certified.
Bouillon is a moisture magnet by composition. High salt content makes it deliquescent, added fats and yeast extracts soften with humidity, and fine granulation gives it plenty of surface area to grab water. Left unprotected, cubes and powders cake, clump in the shaker and turn tacky.
Why bouillon and soup powders cake
Salt is the primary driver: above its critical humidity it pulls water until it dissolves. Combine that with hygroscopic yeast extract, maltodextrin and fat, and a stock powder will set into a paste or block whenever the headspace turns humid. This is a classic case for aggressive moisture control.
Sizing for tubs, pouches and bulk sacks
- Retail tubs and jars: a 1–2 g sachet or film card.
- Catering pouches: a 2–5 g sachet.
- Bulk 10–25 kg sacks: larger sachets placed through the fill.
Fiber pouches customize from 1 g to 1,000 g, so one supplier covers a retail cube line and a food-service bulk sack.
Why fiber wins on salty, fatty powders
Deliquescent salt demands capacity. Fiber adsorbs more than 70% of its weight at RH90 versus roughly 30% for silica, so it keeps pulling moisture after a silica packet has saturated. It is dust-free and FDA food-contact grade (21 CFR 175.300), with a compostable sachet.
Frequently asked questions
Can a desiccant stop bouillon turning to paste? Correctly sized and paired with a good barrier, it holds headspace humidity below the point where salt starts to deliquesce.
How much for a bulk sack? It depends on headspace and salt load; the team can recommend a dose from your pack spec.
Safe against food? Yes — food-contact grade and dust-free.
Related reading: desiccant for spices and seasoning blends, powder moisture risk audit, and how desiccants extend powder shelf life. Browse the fiber desiccant range.
Keeping bouillon free-flowing?
Tell us your product, pack format and monthly volume. ATMOSIScience will recommend a food-grade fiber desiccant dose and send a free sample.
