1-First Step: Preheat and prepare the baking dish Start by preheating your oven to 350°F. Grease a 3-quart baking dish so the casserole releases easily after baking. This first step matters because it helps the dish bake evenly and keeps the edges from sticking.

2-Second Step: Mix the pineapple filling In a large bowl, combine the drained pineapple chunks, the reserved 2 tablespoons of juice, sugar, and flour. Stir until the flour disappears and the fruit looks evenly coated. Then fold in the shredded cheddar cheese.

3-Third Step: Transfer the filling to the dish Spoon the pineapple mixture into the prepared baking dish and spread it out evenly. Try to make the surface level so the topping bakes in a consistent layer. If the mixture looks too dry, add a tiny splash more reserved juice, but only if needed.

4-Fourth Step: Make the buttery cracker topping In another bowl, combine the crushed buttery crackers, melted butter, cinnamon, and nutmeg. Stir until the crumbs are evenly coated. The mixture should look damp but still crumbly, almost like wet sand.

5-Fifth Step: Add the topping and bake Sprinkle the cracker mixture evenly over the pineapple filling. Place the casserole in the oven and bake for 25 to 30 minutes, or until the top is golden brown and the edges are bubbling. That bubbling is a great sign that the filling is hot and thickened properly.

6-Final Step: Rest and serve Remove the casserole from the oven and let it rest for 5 minutes before serving. This short wait helps the filling settle, so it is easier to scoop neat portions. The casserole tastes great warm, and it can also sit at room temperature for a little while during a buffet meal.