Disclosed is a mashed potato that permits ingestion as much as that
adaptable to fully demonstrate functional properties of konjak mannan to
be attained, and is rich in water retentiveness, shape maintainability
and flavors or tastes etc. The mashed potato according to the present
invention is characterized in that addition of konjak mannan containing
not less than 50% by weight of konjak mannan components to mashed potato
dough is required, and no addition of a coagulant is required. An average
particle size of the konjak mannan is not more than 177 .mu.m. A blend of
about 100 or more parts by weight of water per one part by weight of
konjak mannan is prepared, and the amount of konjak mannan added is in
the range of 0.2 to 30% by weight.