"Key Lime" Cloud Squares

1-1/3 cups HONEY MAID Graham Cracker Crumbs, divided

1/4 cup  butter, melted

3/4 cup boiling water

1 pkg.  (3 oz.) JELL-O Lime Flavor Gelatin

1 cup ice cubes

1 pkg.  (8 oz.) Cream Cheese, softened

1 can (14 oz.) sweetened condensed milk

3/4 cup  lime juice

2 cups thawed Whipped Topping

RESERVE 1 Tbsp. graham crumbs. Mix remaining crumbs with butter; press onto bottom of plastic wrap-lined 9-inch square pan. Refrigerate until ready to use.
ADD boiling water to gelatin mix in small bowl; stir 2 min. until completely dissolved. Add ice; stir 2 min. or until thickened. Remove any unmelted ice. Beat cream cheese in medium bowl until creamy. Gradually beat in milk, then lime juice. Add gelatin; mix well. Whisk in 1 cup COOL WHIP. Pour over crust.
REFRIGERATE 6 hours or until firm. Cover with remaining COOL WHIP just before serving; sprinkle with reserved crumbs. Use plastic wrap to remove dessert from pan before cutting into squares.