The UK’s Bestselling Cornish Sea Salt Launches in Texas Costco Clubs with Its Cult-Favorite Celtic Sea Salt Flakes

Cornish Sea Salt, the UK’s bestselling hand-harvested sea salt trusted by top chefs like Yotam Ottolenghi and Nathan Outlaw, is now available in all Costco clubs across Texas. Known for its clean, mineral-rich flavor and signature flake texture, Cornish Sea Salt’s Celtic Sea Salt Flakes are sold in an exclusive 350g tub. 

The launch with one of the U.S’s most-known grocery retailers expands Cornish Sea Salt’s American footprint following its initial debut on Amazon late last year. It also reflects growing momentum in the mineral-forward salt category, as chefs and home cooks alike increasingly seek out unrefined, naturally sourced salts. Celtic sea salt, in particular, is sought-after for its high levels of magnesium, calcium, and other trace minerals—and a recent Global Market Insights report projects the global Celtic salt market will reach $1.3 billion by 2034. 

Celtic sea salt is distinguished by its unrefined, natural harvesting process and is known for being harvested from specific Celtic coastal regions, like Cornwall, UK. Hand-harvested from open waters just meters off the Celtic coast of Cornwall’s protected Lizard Peninsula—one of the world’s rarest geological formations—Cornish Sea Salt is rich in trace minerals that give it a uniquely savory depth. Its delicate Celtic flakes enhance food without overpowering it, making it ideal as a finishing salt or for seasoning proteins, sauces, and marinades. Celtic flakes are known to retain a rich mineral profile, leading to a more impactful flavor, allowing them to be used across a variety of versatile cooking applications. 

In addition to its culinary strengths, Cornish Sea Salt stands out from competitors in its strong commitment to environmental responsibility. Its solar-powered salt house is built with sustainable materials, and its harvesting process is designed to protect the marine ecosystem—removing just 0.5% of the salt from seawater, with the rest returned at a balanced salinity. From sea to packaging, the entire supply chain spans just 10 miles. 

This commitment to sustainability and preservation of traditional salt harvesting methods is deep rooted within the company. Its founder Tony Fraser, a former forester, launched Cornish Sea Salt in 2008, becoming the first English sea salt producer in over a century. After his passing, the company is now led by his close personal friend and COO Phillip Tanswell, a conservationist and engineer who helped design the brand’s proprietary flake production system. His efforts earned him the title of BBC’s “Food Producer of the Year.” 

Cornish Sea Salt’s Celtic Sea Salt Flakes are available now in 350g tubs across Texas, and a wider range of their salts — including Smoky Sea Salts, Really Garlicky, Salt & Peppery and Chilli Hit — are available for national shipping via Amazon. 

For more information, visit cornishseasalt.co.uk. Follow Cornish Sea Salt on Instagram @cornishsea_salt and on TikTok @cornishseasalt.