Fosters Freeze Main Menu BURGERS & SANDWICHES MENU THE BIG BOSS™ A juicy beef patty, with Swiss and American cheese, bacon, lettuce, tomato, pickles, Fosters sauce, and Onion Rings OLD FASHION W/ CHEESE Beef patty topped with Fosters sauce, cheese, lettuce, tomato, and pickles FOSTERS DOUBLE DECKER Double beef patty, with Swiss and American cheese,