GLK Foods, formerly known as Great Lakes Kraut, is the largest sauerkraut producer in the United States. Founded in 1900, this family-owned company operates fermentation facilities in Wisconsin and New York and processes millions of pounds of cabbage annually. Its flagship brands, Silver Floss and Frank's Kraut, offer traditional shredded sauerkraut, Bavarian-style kraut, red cabbage and organic varieties for retail and foodservice. GLK Foods also produces pickled vegetables and fermented snacks under the Oh Snap! brand. The company highlights the health benefits of fermented foods, including natural probiotics and vitamin C, and partners with local farmers to source high-quality cabbage while emphasizing sustainable practices. Its headquarters are located in Wisconsin.