Creating Key Lime Pie Lush can be easily achieved by following these simple steps:

1. Prepare the Crust: In a bowl, combine crushed graham crackers, granulated sugar, and melted butter. Mix until combined and press into the bottom of a 9×13 inch baking dish to form an even layer.
2. Whip Cream Cheese: In a large mixing bowl, beat the softened cream cheese with an electric mixer until smooth and creamy.
3. Add Sugars: Gradually add the powdered sugar to the cream cheese, beating until fully mixed and fluffy.
4. Mix in Condensed Milk: Stir in the sweetened condensed milk until well blended. This will create a rich and creamy filling.
5. Add Lime Juice: Carefully mix in the key lime juice. Fold in the whipped topping, gently incorporating it into the cream cheese mixture until smooth and no lumps remain.
6. Layer the Filling: Pour half of the lime cream mixture over the prepared crust, spreading it evenly.
7. Second Layer: Add a second layer of the remaining cream mixture and spread it evenly over the first layer.
8. Chill: Cover the dish with plastic wrap and refrigerate for at least 4 hours, or overnight for best results, to allow it to set.
9. Garnish: Before serving, top with additional whipped topping and lime zest for a pop of color and citrus aroma.

These straightforward instructions lead you to a mouthwatering dessert that is sure to impress.