The invention relates to a method for producing low
oil content potato chips by a combined process of
vacuum drying and follow-up
microwave vacuum frying, and belongs to the technical field of fruit and
vegetable food processing. The method for producing the low
oil content potato chips comprises the following steps: with fresh potatoes as a
raw material, performing high vacuum and rough vacuum combined pre-
drying on potato chips, alternately freezing with freezing at an ultra-low temperature and slowly freezing, performing
microwave vacuum frying, deoiling in vacuum,
seasoning, packaging, sterilizing and storing. The potato chips are fried under low-temperature vacuum conditions, and the
microwave assistance is utilized; in a first frying stage, the puffing effect and the frying efficiency are improved by large
microwave power, the frying process is accelerated and the
oil absorption peak is crossed; in a second stage, the color of the potato chips is protected by lowering the
microwave power; the two-stage variable frequency microwave vacuum frying technology can be used for keeping the color and luster, special-
flavor substances and nutrients of the potato chips, the
oil content is low, and oil for frying is not easily oxidized, so that the oil content of the fried potato chips is reduced to 28% to 40% from general 40% to 41%.