1 package (3 oz) Jell-O Gelatin (any fruit flavor)
1 cup boiling water
3/4 cup cold water*
*For very firm cubes, cold water may be reduced to 1/2 cup. For softer cubes, cold water may be increased to 1 cup.
Dissolve gelatin in boiling water. Add cold water. Pour into a shallow pan. Chill until firm-at least 4 hours or overnight. (cubes hold their shape best when gelatin is chilled over night.) Then cut in cubes, using sharp knife which has been dipped in hot water. To remove cubes from pan, apply warm wet cloth over bottom of pan, then remove with spatula. Or quickly dip pan in warm water and invert on wax paper. Serve in sherbet glasses with cream or fruit, if desired.