What are closed sandwiches?

A closed sandwich, also known as a filled or stuffed sandwich, is a sandwich which has either one or two pieces of bread with filling or spread inside with both pieces touching each other on at least one side. Open sandwiches have the spread touching the open air on one side.

Closed sandwiches typically contain ingredients such as cheese, meats, poultry, or spreads placed between the slices of bread. They may be toasted, grilled, or heated in some manner to combine the flavours and to melt cheese if present.

Examples of closed sandwiches include grilled cheese sandwiches, tuna salad sandwiches, ham and cheese sandwiches, and peanut butter and jelly sandwiches. These types of sandwiches are popular due to their portability and convenience, making them great options for breakfasts, lunches, dinners, or snacks.