High content of reducing sugars in lychee pulp results in
browning during drying process. So, mixing lychee with other
food materials is done in order to reduce their sugar content.
Food materials containing starch are suitable for mixing with
lychee because these materials tend to reshape due to the viscosity. In this research, purple potato was chosen to be mixed
with lychee because of its unique characteristics which are as
follows: low sugar content, weak odor and taste, high starch
composition and lots of phenolic compounds that are healthy
to human. Amylopectin proportion in total starch of purple
sweet potato and its swelling potential of starch are low. So
re-structured purple sweet potatoes with adding water rather
than slices could be used to produce the puffing snacks (Liu
et al., 2012).