Step 1

Preheat oven to 350º F and grease a 9x13-inch baking dish with butter or non-stick spray.

Step 2

In a large bowl, whisk together cheese, sugar and flour, mixing until the cheese is totally coated.

Step 3

Stir in pineapple chunks and crushed pineapple, then mix in ground cinnamon, if using.

Step 4

Pour pineapple mixture into greased baking dish.

Step 5

In a medium bowl, mix crushed ritz crackers with melted butter, then sprinkle mixture over baking dish in an even layer.

Step 6

Place baking dish in oven and bake for 30 minutes, or until crackers are golden and crispy.

Step 7

Remove from oven and serve hot.