This oven baked 3-ingredient powdered milk potato scallop is the kind of practical, old-fashioned casserole that turns a few pantry staples into something deeply comforting. Thinly sliced potatoes bake in a simple creamy mixture made from powdered milk and water, creating tender layers and a lightly browned top without any complicated prep. It is an economical dish with a vintage home-cooking feel, and it remains a smart choice when you want a cozy side or simple supper from ingredients you likely already have on hand.
Serve this potato scallop alongside baked ham, roast chicken, meatloaf, pork chops, or grilled sausages for a classic family meal. It also works well with green beans, buttered peas, a crisp cucumber salad, or sliced tomatoes to balance the richness. If you are serving it as a modest main dish, add a leafy salad and some roasted vegetables to round out the plate.
Oven Baked 3-Ingredient Powdered Milk Potato Scallop
Servings: 6
Ingredients
2 pounds russet potatoes, peeled and thinly sliced
1 cup powdered milk
2 1/2 cups water
Directions
1. Preheat the oven to 350°F and lightly grease a medium glass baking dish. Peel the potatoes and slice them very thinly so they cook evenly and form tender layers.
2. In a bowl or measuring pitcher, whisk the powdered milk and water together until smooth and fully dissolved.
3. Arrange half of the sliced potatoes in the prepared baking dish in overlapping layers. Pour over half of the milk mixture, then repeat with the remaining potatoes and the rest of the liquid.
4. Cover the dish loosely with foil and bake for 45 minutes. Remove the foil and continue baking for 25 to 35 minutes more, or until the potatoes are tender and the top is lightly golden brown.
5. Let the potato scallop rest for 10 to 15 minutes before serving so the creamy liquid can settle slightly and the layers hold together better when spooned out.
Variations & Tips
Add seasoning: Even though the original is built around three pantry ingredients, a little salt and black pepper will bring out the flavor of the potatoes. A pinch of onion powder can also add a gentle savory note without changing the character of the dish.
Choose the right potato: Russet potatoes give the softest, fluffiest texture and help thicken the milk mixture naturally as they bake. If you use Yukon Gold potatoes, the finished dish will be slightly firmer and richer.
Slice evenly: Try to keep the potato slices about 1/8 inch thick. A mandoline is helpful here, but a sharp knife works fine too. Even slices are what make the casserole cook uniformly from edge to center.
Make it richer: For a more indulgent version, replace part of the water with whole milk or stir in a small pat of butter between the layers. That is no longer the strict 3-ingredient version, but it produces an especially velvety finish.
Prevent curdling: Mix the powdered milk thoroughly before pouring it over the potatoes, and avoid baking at too high a temperature. Gentle baking helps the sauce stay smoother while the potatoes become tender.