For a quick-set gelatin, substitute 2 cups ice cubes for the cold water. Dissolve gelatin mix in boiling water as directed, then add the ice; stir 3 to 5 min. or until gelatin begins to thicken. Remove any unmelted ice. Pour thickened gelatin into center of cake; continue as directed.
Prepare using JELL-O Lime Flavor Sugar Free Gelatin and COOL WHIP LITE Whipped Topping.
Prepare using a white cake mix.