Disclaimer: I've only made Jello once in my life. But I believe every culinary artist should know how to make a Jello creation. Just because.

It was discontinued in 2002, but the 3-layered-parfait always was a bit of a scientific wonder (creepy, even?) to me. Here's the homemade version Jello 1-2-3 recipe.

Jello 1 2 3

aka

JELL-O Magic Mousse

Three layers are made as the jello cools in the refrigerator.

prep time

10 min

total time

8 hr 10 min

makes 6 servings

Ingredients:
3 cups boiling water

1 pkg. (6 oz.) JELL-O Strawberry Flavor Gelatin

1 tub (16 oz.) COOL WHIP Whipped Topping, thawed

Directions:
ADD boiling water to gelatin mix in large bowl; stir 2 min. until completely dissolved. Whisk in COOL WHIP until well blended. (Mixture will be thin.)

POUR into 10 glasses or dessert dishes, 1-1/2-qt. bowl or 6-cup mold sprayed with cooking spray.

REFRIGERATE 8 hours or until firm. If using mold, unmold dessert onto serving plate just before serving.

Kraft Kitchens Tips

Shortcut

Is the COOL WHIP still frozen? No need to worry. Just follow the recipe as directed, using the still-frozen COOL WHIP. Just be sure to stir the gelatin mixture until the COOL WHIP is completely melted as directed before pouring into the glasses, dessert dishes, bowl or mold.

How to Halve Recipe

This recipe can easily be halved to make 5 servings. Prepare as directed, using 1-1/2 cups boiling water, 1 pkg. (3 oz.) JELL-O Strawberry Flavor Gelatin and 1 tub (8 oz.) COOL WHIP Whipped Topping. Pour into 5 glasses or dessert dishes, 1-qt. bowl or 3- to 4-cup mold sprayed with cooking spray.

Taken from this Kraft site:
Jello 1-2-3 QA answered: