Preheat your oven to 350°F (175°C). In a mixing bowl, combine Oreo crumbs with melted unsalted butter, stirring until evenly coated. Firmly press the mixture into the bottom of a 9x13-inch baking dish. Bake for 8–10 minutes, until set and fragrant. Once baked, let it cool completely on a wire rack before adding the next layer.

In a large mixing bowl, beat softened cream cheese and powdered sugar together until smooth and creamy. Gently fold in half of the whipped topping and half of the chopped pecans, mixing until well combined. Spread this delightful cream cheese mixture evenly over the cooled Oreo crust, smoothing the top with a spatula for an even layer.

In another bowl, whisk together the instant chocolate pudding mix and cold milk for about 2 minutes until thickened and smooth. Ensure no lumps remain, as this layer provides essential creaminess to your Turtle Lush. Once ready, evenly spread the chocolate pudding mixture over the cream cheese layer, creating a beautiful contrast.

Spread the remaining whipped topping over the chocolate pudding layer, making it fluffy and inviting. Drizzle the top generously with caramel sauce and chocolate syrup, creating an enticing pattern. Sprinkle the rest of the chopped pecans on top for an added crunch. Cover the dish and refrigerate for at least 4 hours, or overnight for the best flavor and texture.