Description
This Creamy Scalloped Potatoes recipe features thinly sliced potatoes and onions baked in a luscious flour and milk sauce, topped with optional Romano cheese for added flavor. Perfectly golden and crispy on top, this comforting side dish takes just over an hour to prepare and serve 8 people.
Ingredients
Scale
Main Ingredients
- Cooking spray (for greasing)
- 5–6 cups thinly sliced potatoes (1/8–1/4 inch thick)
- 2 cups thinly sliced onions
- 3 cups whole milk
- 1/3 cup all-purpose flour
- 3 teaspoons kosher salt
- 3/4 teaspoon ground black pepper
- 1/4 cup grated Romano cheese (optional)
Instructions
- Preheat and prep: Preheat your oven to 400°F (200°C). Grease a 9×13 inch baking dish thoroughly with cooking spray to prevent sticking.
- Layer potatoes and onions: Begin by layering the thinly sliced potatoes evenly over the bottom of the prepared dish. Sprinkle half of the sliced onions on top, followed by 1 teaspoon of kosher salt and 1/4 teaspoon of ground black pepper. Repeat the layering process with the remaining onions and seasoning, finishing with a top layer of potatoes seasoned with the remaining salt and pepper.
- Make sauce: In a bowl, whisk together the all-purpose flour and whole milk until you achieve a smooth mixture. Pour this sauce over the layered potatoes and onions, adding extra milk if necessary to just cover the layers without submerging them completely.
- Add cheese (optional): Evenly sprinkle the grated Romano cheese over the top of the assembled dish if you choose to use it. This will add a savory depth and enhance browning.
- Bake uncovered: Place the dish in the preheated oven and bake uncovered for approximately 1 hour. Bake until the scalloped potatoes are tender and the top is golden brown and crispy, signaling that it is ready.
- Serve: Allow the dish to cool for about 10 minutes after removing it from the oven. This resting time helps set the sauce for easier serving. Then, serve warm as a delicious side dish.
Notes
- Use whole milk for a creamier sauce, but you can substitute with 2% milk for a lighter option.
- Ensure potatoes are uniformly sliced to cook evenly; using a mandoline slicer can help.
- Do not cover the dish during baking to maintain a crispy top layer.
- If you prefer a richer dish, consider adding grated cheddar cheese along with or instead of Romano.
- Resting the dish before serving helps the sauce thicken and improves sliceability.
- Prep Time: 15 minutes
- Cook Time: 1 hour
- Category: Side Dish
- Method: Baking
- Cuisine: American
