For a limited time only, Sonic Drive-In will be offering two brand new sandwiches, the Bacon Cheddar Toaster Melt and the Mushroom Swiss Toaster Melt. The Bacon Cheddar Melt will feature a 100% beef patty with cheddar cheese, crispy bacon, grilled onions, pickles and hickory BBQ sauce, sandwiched between their thick Texas toast. The Mushroom Swiss will feature a 100% beef patty with sauteed Portobello mushrooms, Swiss cheese, grilled onions and mayonnaise, also between their Texas toast. For $1.99, you'll set yourself up with a smaller version of their beef patties, whereas $3.49 will land you a thicker, 1/4 pound beef patty.