This oven baked 3-ingredient canned Spam potato casserole is the kind of simple, budget-friendly comfort food that sticks with you for good reason. Built from pantry basics and baked until the potatoes turn fork tender and the edges brown up beautifully, it reflects the practical, filling meals many families relied on during leaner times. It is easy to make, hearty enough for a weeknight dinner, and has that old-fashioned casserole feel that makes a modest ingredient list taste surprisingly satisfying.
Serve this casserole with a crisp green salad, steamed green beans, buttered peas, or simple applesauce for a classic sweet-and-savory pairing. If you want to stretch the meal a little further, it also goes well with dinner rolls, roasted carrots, or a fried egg on top for a hearty brunch-style plate.
Ingredients
1 can Spam, sliced into thin pieces
4 medium russet potatoes, peeled and sliced into thin rounds
1 cup milk
Directions
1. Preheat the oven to 350°F and lightly grease a medium glass baking dish.
2. Peel the potatoes and slice them into thin, even rounds. Slice the Spam into thin pieces.
3. Layer half of the potato rounds in the bottom of the baking dish, then add half of the Spam slices. Repeat with the remaining potatoes and Spam to create even layers.
4. Pour the milk evenly over the layered casserole, cover the dish tightly with foil, and bake for 1 hour.
5. Remove the foil and continue baking for 20 to 30 minutes, or until the potatoes are fork tender and the top edges are lightly browned. Let the casserole rest for 10 minutes before serving.
Variations & Tips
Add onion: If you can stretch beyond three ingredients, thinly sliced onion layered between the potatoes and Spam adds a lot of flavor and a little sweetness as it bakes.
Use a mandoline carefully: Thin, even potato slices help the casserole cook through at the same rate. If your slices are too thick, you may need extra baking time and a little more milk.
Make it creamier: For a richer texture, swap part of the milk for evaporated milk. It gives the casserole a more old-fashioned, silky finish without adding extra fuss.
Brown the top more: If you like crispier edges, place the uncovered casserole under the broiler for 1 to 2 minutes at the end, watching closely so it does not burn.
Meal prep tip: You can peel and slice the potatoes ahead of time and keep them in cold water in the refrigerator for a few hours. Just drain and pat them dry well before layering the casserole.