All natural. Founded in Montgomery county in 1906. A Philadelphia favorite every since. Since 1906. Florence and Harvey Keller began creating Keller's Creamery butter in 1906 by slow-churning only the best Grade A cream in Montgomery County, Pennsylvania. Their passion and high standards were passed down from generation to generation. Today, Keller's is proud to carry on the family's tradition. We thank you for making Keller's one of Philadelphia's favorite since 1906. Butter is naturally gluten free. Made in USA.