Using lotus seed, skimmed milk as the main raw material, a kind of solidification type lotus yoghurt is achieved with comprehensive evaluation method of fuzzy mathematics and orthogonal test. The results show that when the lotus seed powder and milk powder are made into suspension according the ratio of tomaterial to water are 1∶5, the ratio of lotus to milk is 1∶2, sugar 5%, inoculum size 4%, fermentation time 4 h at 42℃, the optimal product can be prepared. The influence of lotus yogurt quality: the rati...