Wilma and Betty are finalists in a television bake-off, but on the eve of the event, they contract measles. Donning full drag—including wigs, dresses, and plucked-out eyebrows—Fred and Barney take their places in the contest to prepare their “Upside-Down Flint/Rubble Bubble Cake,” but one of the guys’ carelessness (specifically (and accidentally) using the wrong flour brand) could jeopardize the win of the grand prize.