Pour boiling water into a blender and add gelatin. Cover and blend at low speed until gelatin is completely dissolved (about 30 seconds). Combine cold water and ice cubes to make 1 1/ 4 cups. Add gelatin and stir until ice is partially melted. Then add Cool Whip; Blend at high speed, about 30 seconds. Pour into dessert glasses. Chill about 30 minutes.
Dessert layers as it chills.
Yield: 4 servings