Butter-O-Mart was a store/base set up in Arlen by the Pumkins to sell butter during The Great Pumkin War. It eventually was destroyed.
During the Pumkin's dominance in Arlene, this place was set up as a base/store to serve the Pumkins. Unfortunately, this base lead to their downfall. Hank Hill lead a rebel attack to the base that forced the Pumkins to retreat from Arlen.