AuX Labs wants to turn idle craft-brew tanks into micro-factories for casein, the milk protein most plant-based cheeses lack. The food‑tech startup says it can produce casein through precision fermentation in brewery fermenters — a move that could improve melt and stretch in vegan cheese while giving microbreweries a new revenue stream.

Casein without cows Vegan cheese often fails to match dairy when it comes to melt and stretch. The missing piece is casein, the milk protein that gives cheese its structure and makes it behave the way pizza lovers expect. AuX Labs, a food‑tech startup, says it can produce casein in fermentation tanks rather than from cows, and that could change how plant‑based cheese melts, slices and pulls. "Melt and stretch are non‑negotiables," said Ted Jin, co‑founder and CEO of AuX Labs. AuX is developing microbial strains and fermentation methods to reproduce casein. The company uses bioreactors to grow microbes that manufacture the protein, then harvests and processes the output into an ingredient that can be blended into vegan cheese recipes. The approach echoes other precision‑fermentation efforts aiming to recreate animal proteins without animals, but AuX is pitching a different route to scale. Spare fermenters, new income Instead of building its own industrial fermentation facilities, AuX plans to tap existing small‑scale brewers. There are thousands of microbreweries in the U.S., and many of those sites now have underused tanks. "There is a lot of excess capacity in the system," Jin said. AuX has designed its microbial strains and process to be compatible with the stainless‑steel tanks and workflows common in craft breweries. That means breweries can run a protein fermentation run on equipment they already own, giving them a second revenue stream beyond beer. For AuX, the arrangement avoids the heavy capital costs of buying fermenters while giving the startup distributed manufacturing capacity across many small sites. Business model and funding - Funding: AuX has raised US$4 million in a seed round led by NYA Ventures and Nàdarra Ventures, with participation from Bluestein Ventures, Builders VC, Congruent Ventures and Verdex Capital. - Use of funds: support strain development, pilot projects with partner breweries, and scale‑up of downstream processing to turn fermented casein into a usable food ingredient. - Logistics: Jin, who previously worked at Procter & Gamble, says the team is focused on both the science and the logistics of getting product into production. AuX is working directly with breweries to refine the process and ensure product quality meets food‑safety and sensory targets. The company envisions selling kits that include microbial cultures and operating instructions so brewers can run the process themselves. Why this matters Using existing brewery capacity could shorten supply chains for plant‑based ingredient makers and enable more local sourcing of protein through partner breweries. For a sector where texture and sensory performance are major barriers to wider consumer adoption, a distributed manufacturing model could make specialty ingredients more accessible to smaller food makers.

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"Melt and stretch are non‑negotiables," said Ted Jin, co‑founder and CEO of AuX Labs.

This article was created with AI assistance.