A grilled cheese sandwich is made by placing a cheese filling, often cheddar or American cheese, between two slices of bread, which is then heated until the bread browns and the cheese melts. A layer of butter or mayonnaise may be added to the outside of the bread for additional flavor and texture. Alternatives may include additional ingredients, such as meat, peppers, tomatoes, or onions. Methods for heating the sandwich include cooking on a griddle, fried in a pan, or using a panini grill or sandwich toaster, the latter method more common in the United Kingdom, where the sandwiches are normally called "toasted sandwiches" or "toasties", in Australia, where they are called "jaffles" or "toasted sandwiches", and South Africa, where they are called “snackwiches”. Other methods include baking in an oven or toaster oven — or in a toasting bag in an electric toaster.
What type of cheeses can you use to make a grilled cheese sandwich.
Common cheeses to make a grilled cheese are cheddar or American cheese, although you are not limited to those cheeses.  Depending on a persons preferences there are a large variety of cheeses that are well suited for a grilled cheese sandwich. Many people enjoy Swiss cheese, provolone, mozzarella cheese, brie, Monterey jack cheese, pepper jack cheese,  gouda, havarti, fontina and many others.