PURPOSE: Coating films of metal salt are formed on the surfaces of a jelly cube and the jelly inside the films is melted to form a jelly food product of a body of continuously curved surface such as sphere or ellipsoid.

CONSTITUTION: Additives for forming jelly, sodium alginate and water are mixed, dissolved with heat, combined with pigments, cooled to form jelly and the jelly is cut into a number of cubes. These cubes are dipped in a solution of salt of a metal such as calcium or aluminum, taken out of it and put in a hot water that is higher than the melting point of the jelly and almost the same in specific gravity as the cubes to form coating films of the metal salt of alginic acid on the surfaces of each cube and melt the jelly inside each cube.