The Gene Autry Show (1950) : 3x9

Deadly explosives have been smuggled into U.S.A., from Mexico, via pastries. Mexican authorities seek help from Gene and Pat, who try to run down the smuggling outlaws. While Pat is busy trying to carry a birthday cake for Gene without tripping and falling into it, and a French baker, Mimi, Gene discovers evidence at a death sight of a Mexican official that point to the pastries. Pat carries a box with a cake in it that secretly holds explosives, Gene saves his friends, and brings Mimi and her gang in.