Prevention of puffing during frying of expanded snack products

Abstract

A process for making fried expanded snack products includes preparing a moist dough principally from solids, such as corn or potato solids. Larger particle size dry food particles, such as wheat or rice particles, are included in the dough. The dough is then formed, such as by roller-forming, into a thin sheet, and dough pieces cut from the sheeted dough are fried in hot cooking oil to form a fried expanded snack. The larger food particles project through or are contained in the surface of each dough piece to cause steam to escape during frying, which greatly reduces 'puffing', i.e., formation of undesired bubbles in the snack, during frying. By providing a sufficient number of larger particles with an average particle size at least about to the thickness of the dough piece (so that an appreciable number of particles can project through or be contained in the surface of the dough piece), formation of undesired large bubbles is significantly reduced. The size of the largest bubbles formed during drying is proportionately reduced as the amount of larger particles added to the dough is increased. Formation of bubbles larger than a maximum tolerable size can be controlled to within acceptable limits by adding particulates greater in particle size than the dough thickness and in an amount that results in at least one particle per unit surface area of the sheeted dough piece, where said unit surface area is the largest acceptable size (area) of any bubbles formed during frying.