1. Prepare the Crust: Grab your food processor and toss in those 36 Oreos. Pulse them until they become fine crumbs. Pour in the melted butter and pulse again until everything is well combined and looks like wet sand.
2. Form the Base: Evenly spread the Oreo mixture into the bottom of a 9 x 13-inch baking pan. Use the back of a spoon or your fingers to press it down firmly, creating a compact crust. Set this aside.
3. Whip the Filling: In a large mixing bowl, combine the softened cream cheese and powdered sugar. Beat them together until smooth and creamy. Gently fold in the thawed whipped topping.
4. Add Grinchy Color: Now for the fun part! Add a few drops of neon green food coloring to the cheesecake mixture. Mix it in until you achieve your desired shade of Grinch-approved green. Start with a little and add more if needed!
5. Assemble the Cheesecake: Carefully spoon the green cheesecake filling over your prepared Oreo crust, spreading it out evenly with a spatula.
6. Chill & Serve: Cover the pan with plastic wrap and pop it into the refrigerator for at least 4 hours, or until it's firm enough to slice. Before serving, you can add a dollop of fresh whipped cream or a sprinkle of festive decorations to each slice for an extra touch of cheer!