Fifty percent of trade potato grits in a pellet recipe were
replaced by coloured flour from four coloured-fleshed potato varieties.
For the control sample of snacks, 335 g of starch and 130 g of
potato grits were mixed with corn semolina, salt and rape seed oil
to obtain 500 g of dough mixture. The moisture content of the
dough for extrusion was established at 40–45% by adding a suitable
quantity of water. The moistened mixture was pressed by a
sieve and placed in sealed polyethylene bags under refrigeration
for 12 h to equilibrate the moisture in the dough.