Set your oven to 350°F (175°C) and lightly grease a 9x9-inch baking dish or a dish of similar size.

In a mixing bowl, combine the crushed pineapple, pineapple chunks, and 1/4 cup of the reserved juice.

Stir in the sugar and flour until everything is well blended.

Add the shredded cheddar cheese to the mixture and fold it in evenly.

Transfer the pineapple mixture to the greased baking dish, spreading it out in an even layer.

In a separate bowl, toss the crushed Ritz crackers with the melted butter until the crumbs are fully coated.

Evenly sprinkle the buttery cracker crumbs over the pineapple mixture in the dish.

Bake for 25-30 minutes, or until the top is golden and the edges are bubbling. Allow it to cool for about 5 minutes before serving. Enjoy!