A saltine or soda cracker is a thin, usually square
cracker made from white
flour,
shortening,
yeast, and
baking soda, with some varieties lightly sprinkled with coarse
salt. It has perforations throughout its surface, to allow steam to escape for uniform rising, and along the edges, as individual crackers are broken from larger sheets during manufacture. It has a very dry and crisp texture, as it is made with less shortening than other varieties such as
Ritz crackers.
See more at Wikipedia.org...