Square cracker is a term used to describe two popular types of crackers: SALTINE and cheezit. SALTINE crackers are thin, square-shaped crackers made from flour, yeast, and baking soda. They are usually served with soups or salads. Cheezit crackers are also square-shaped, but they are made with cheese and other ingredients such as wheat flour, vegetable oil, and salt. They are often eaten as a snack or with dips. Both types of crackers are popular and can be found in most grocery stores.