Indulge in the irresistible goodness of Starbucks Grilled Cheese Sandwich! Made with a perfect blend of sourdough bread, gooey mozzarella, and rich white cheddar cheese on the inside, and a savory butter garlic parmesan crust on the outside. This is comfort food at its finest. Get the easy copycat recipe to make the best homemade grilled cheese sandwich at home.