1-First Step: Get the oven and dish ready. Preheat your oven to 350°F. Lightly grease a 3-quart baking dish so the filling does not stick. This simple step helps the casserole bake evenly and makes cleanup easier later. While the oven heats, gather all ingredients so you do not have to stop and search once you begin mixing.

2-Second Step: Mix the pineapple filling. In a large bowl, combine the drained pineapple chunks, reserved 2 tablespoons of juice, sugar or brown sugar, flour, and shredded cheddar cheese. Stir everything together until the pineapple is coated and the flour is worked in well. The reserved juice adds extra moisture, and the cheese blends into the sweet mixture, which is what gives this southern style pineapple casserole recipe its signature flavor. Make sure the mixture looks evenly combined. If you see dry flour at the bottom of the bowl, keep stirring for another few seconds. This is also a good moment to taste the pineapple mixture if you want to check the sweetness before baking.

3-Third Step: Transfer the filling to the baking dish. Spoon the pineapple mixture into the prepared baking dish and spread it out in an even layer. Press it down lightly with the back of a spoon so the surface is level. This helps the casserole cook evenly and gives the topping a nice base to sit on. At this point, the dish already smells delicious because the pineapple and cheddar begin to mingle. That sweet and savory smell is one of the reasons people love this pineapple cheese casserole for family meals and holidays.

4-Fourth Step: Make the buttery cracker topping. In another bowl, combine the crushed buttery crackers, melted butter, ground cinnamon, and ground nutmeg. Stir until the cracker crumbs are fully coated with butter and the spices are spread through the mixture. You want the topping to look damp but not soggy, with no dry cracker patches left behind. This topping is what gives the easy southern pineapple casserole its golden finish. If you like extra crunch, crush the crackers a little more coarsely. If you want a finer topping, break them down more before mixing.

5-Fifth Step: Add the topping and bake. Sprinkle the cracker mixture evenly over the pineapple layer. Try to cover the surface from edge to edge so every serving gets some crunchy topping. Then place the dish in the preheated oven and bake for 25 to 30 minutes. During baking, the casserole should become golden brown on top and bubbly around the edges. That bubbling is a great sign that the filling is hot and cooked through. If the top starts browning too quickly near the end, you can loosely cover it with foil for a few minutes.

6-Final Step: Rest and serve. Once the casserole is done, remove it from the oven and let it rest for 5 minutes before serving. This short rest helps the filling settle a little, so scooping is easier and the layers hold together better on the plate. Serve it warm for the best texture and flavor. A short rest after baking makes a big difference. It helps the filling thicken just enough so each spoonful comes out neatly.