With rice flour,wheat flour and corn starch as main raw materials and purple potato and yam as auxiliary materials,the extruded food of purple potato and yam was prepared by twin-screw extruding process.On the basis of single factor experiment,Box-Beheken response surface analysis was used to optimize the formula of purple potato yam puffed food.The comprehensive score of purple potato and common yam rhizome puffed food prepared under the condition that the puffers of purple potato and yam with 8％of purple potato powder,6％of yam powder and 2∶1 ratio of wheat flour and corn starch,was the highest.
维普
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