Dissolve dry gelatin mix in boiling water in bowl. Add enough ice cubes to cold water to measure 1-1/4 cups; add to gelatin mixture. Add to blender; cover and blend 30 sec.
Add whipped topping; cover. Blend until smooth.
Pour evenly into 4 dessert dishes. Refrigerate at least 20 min. or until set. Store leftover dessert in refrigerator.