Make the Crumble:

1. Combine Ingredients: Mix graham cracker crumbs, melted butter, and sugar in a bowl until well combined. This creates the crumble mixture.
2. Set Aside: Set the crumble mixture aside while you prepare the fluff.

Prepare the Fluff:

1. Beat Cream Cheese: In a large mixing bowl, beat the softened cream cheese until smooth. This ensures a creamy base.
2. Add Sugar and Vanilla: Add the powdered sugar and vanilla extract, continuing to beat until well blended. This sweetens and flavors the fluff.
3. Fold in Whipped Topping: Gently fold in the thawed whipped topping until the mixture is smooth. This creates a light and airy texture.

Assemble the Layers:

1. First Crumble Layer: In your serving dish, layer half of the crumble mixture at the bottom. This creates the first layer.
2. Cream Cheese Layer: Spread the cream cheese mixture over the crumble layer evenly. This creates the creamy middle layer.
3. Cherry Pie Filling Layer: Top with the cherry pie filling, spreading it out to cover the cream cheese layer completely. This adds the fruity layer.
4. Final Crumble Layer: Finish by sprinkling the remaining crumble mixture over the cherry layer. This adds the final crunchy topping.

Chill:

1. Refrigerate: Refrigerate for at least 2 hours before serving to allow the flavors to meld and the dessert to firm up. This allows the dessert to set.