Note 1: Starbucks uses a combination of mozzarella and white cheddar cheese in their grilled cheese. I prefer cheese SLICES because I feel like it yields the most MELTY grilled cheese. But shredded cheese works well, too! I get White American Cheddar cheese at the deli counter at my chain grocery store. Provolone, havarti, fontina and yellow cheddar are also super melty and work great.