Clover Sonoma, 91 Lakeville St, Petaluma, CA 94952, US

Challenge Dairy Products is a cooperative association that markets and distributes dairy products produced by more than 600 family-owned farms. The company s brands of butter include Challenge Butter and Danish Creamery Butter. Its collection of butter also includes unsalted, whipped, creamery and light. Challenge Dairy Products offers a variety of milk, cream, yogurt and milk powder. The company additionally provides domestic and processed cheese, eggs, oil, mayonnaise, meat, salad dressings and desserts. It has partnerships with the California Cheese & Butter Association, American Butter Institute and Dairy Management. Founded in 1911, Challenge Dairy Products is located in San Leandro, Calif.