**Prepare the Crust:**
In a mixing bowl, combine graham cracker crumbs, melted butter, and granulated sugar. Stir until the mixture resembles wet sand. Press firmly into the bottom of a 9x13-inch baking dish. Chill in the refrigerator while preparing the filling.
**Make the Filling:**
In a large bowl, beat cream cheese and softened butter together until smooth and creamy. Gradually mix in powdered sugar until fully combined.
**Add Pineapple:**
Fold in the drained crushed pineapple. Gently fold in the whipped topping until the filling is light and fluffy.
**Assemble the Dessert:**
Spread the filling evenly over the prepared crust. Smooth the top with a spatula.
**Add Topping:**
Sprinkle crushed graham crackers on top if desired.
**Chill:**
Refrigerate for at least 4 hours, or until set.
**Serve:**
Slice into squares and enjoy a slice of tropical paradise!