1-First Step: Prep the oven and baking dish Preheat your oven to 350°F. Grease a 3-quart baking dish well so the filling does not stick. This step matters because the casserole bubbles a lot as it bakes, and a greased dish makes serving much easier later.

2-Second Step: Mix the pineapple filling In a large bowl, combine the drained pineapple chunks, the reserved 2 tablespoons of juice, the sugar, and the flour. Stir gently until the pineapple is evenly coated. The reserved juice helps the mixture stay moist and gives the flour something to work with, which helps the filling thicken as it bakes. Next, stir in the shredded cheddar cheese until everything looks evenly mixed. The cheese may seem unusual at first, but it melts into the sweet pineapple and gives the dish its famous sweet-savory flavor.

3-Third Step: Transfer to the baking dish Spoon the pineapple mixture into the prepared baking dish and spread it out evenly. Make sure the fruit is in a fairly level layer so it bakes at the same pace all the way through. If you want a slightly deeper flavor, you can let the filling sit for a few minutes before baking so the sugar begins to dissolve.

4-Fourth Step: Make the buttery cracker topping In another bowl, mix the crushed crackers, melted butter, cinnamon, and nutmeg. Stir until the crumbs are fully coated. The mixture should look damp and sandy, not dry. This topping is what gives the casserole its crisp finish, so take a moment to break up any big cracker pieces.

5-Fifth Step: Add the topping and bake Sprinkle the cracker mixture evenly over the pineapple filling. Try to cover the entire surface so every bite gets a bit of crunch. Then place the dish in the oven and bake for 25 to 30 minutes, or until the top looks golden brown and the edges are bubbling. Keep an eye on it near the end of the baking time. If your oven runs hot, the topping may brown a little faster. If needed, you can loosely cover it with foil for the last few minutes, but usually the casserole bakes beautifully on its own.

6-Final Step: Rest and serve Let the casserole rest for 5 minutes before serving. This short rest helps the filling settle and makes it easier to scoop neat portions. Serve warm as a side dish with ham, turkey, pork, or your favorite holiday mains.