Abstract: Using sweet potato as main raw material, the production conditions of sweet potato soft candy were investigated. the optimal gelling agent and the drying conditions were confirmed by comparion experiments, and the orthogonal test was used to determine the optimum formulation. The results showed that mixed materials comprise sweet potato paste 200 g, sugar 100 g, citric acid 0.2 g and gelling agent 2%, using the agar (1%) and plus carrageenan (1%) as gelling agent. After drying, the mixed matrials at 50 ℃ for 16 to 20 h. The soft candy product is obtained, which has good chewiness and mouth feel, golden and transparent appearance and high sensory score.

Key words: sweet potato, candy, technology