1-First Step: Get the oven and baking dish ready Start by preheating your oven to 350 degrees Fahrenheit. Then prepare a 3-quart baking dish with cooking spray. This helps the casserole release easily after baking and makes cleanup simpler too. If you are planning ahead for a holiday meal, this is a good moment to gather everything so the rest of the recipe moves fast.

2-Second Step: Mix the pineapple filling In a large bowl, add the drained pineapple chunks, reserved pineapple juice, sugar, and flour. Stir until every piece looks evenly coated. This step matters because the flour helps the filling thicken while baking, and the reserved juice adds just enough moisture to keep the casserole from turning dry. If you prefer brown sugar, it works well here and adds a deeper flavor. Once the pineapple mixture is coated, stir in the shredded cheddar cheese until everything is well combined. The cheese may seem unusual at first, but it is what gives Pineapple Casserole that classic Southern taste. The sweet pineapple and sharp cheese create a flavor combo that feels rich without being hard to make.

3-Third Step: Transfer the filling to the dish Spoon the pineapple mixture into the prepared baking dish and spread it out in an even layer. Try to get the filling into the corners so it bakes evenly. This is also a nice stage to think about small custom touches. If you want a fruitier version, you can mix in a little diced mango or a handful of coconut flakes, though the classic version is wonderful on its own.

4-Fourth Step: Make the buttery cracker topping In a separate bowl, combine the crushed crackers, melted butter, cinnamon, and nutmeg. Stir until the mixture looks like wet sand. That texture is what helps the topping bake into a crisp, golden layer. Butter crackers work best, but other buttery crackers can also do the job if that is what you have in the pantry. Spread the topping evenly over the pineapple mixture. Be gentle so you do not press it down too much. You want the topping to stay light so it browns well in the oven.

5-Fifth Step: Bake until golden and bubbling Bake the casserole for 25 to 30 minutes, or until the top is golden brown and the filling is bubbling around the edges. Every oven is a little different, so keep an eye on it near the end of the bake time. If your topping is browning too fast, you can loosely cover the dish for a few minutes, though most of the time that is not needed. The casserole should smell buttery, sweet, and a little toasty when it is ready. That is your sign it is close.

6-Final Step: Rest and serve warm Let the casserole rest for 5 minutes before serving. This short rest helps the filling settle so it is easier to scoop. Serve it warm as a side dish with ham, turkey, or any roast dinner. It feeds about 8 people, which makes it a great pick for family meals and gatherings.