Whataburger Mushroom Swiss Whatameal PreviousJalapeƱo & Cheese Whataburger Whatameal NextWhataburger Patty Melt Whatameal Mushroom Swiss Whatameal Mushroom Swiss Whatameal $9.50 Large bun (5"), 2 large beef patties (5"), Swiss American cheese (2 slices), fire roasted mushrooms, creamy au jus. Quantity: Add To Cart Facebook0 Twitter