Description
This creamy scalloped potatoes recipe features thinly sliced potatoes layered with onions and baked in a rich, velvety milk and flour sauce, topped with optional Romano cheese for a deliciously golden and crispy finish. Perfect as a comforting side dish for family dinners or holiday meals.
Ingredients
Scale
Potatoes and Vegetables
- 5-6 cups thinly sliced potatoes (1/8-1/4 inch thick)
- 2 cups thinly sliced onions
Dairy and Sauce
- 3 cups whole milk
- 1/3 cup all-purpose flour
- 1/4 cup grated Romano cheese (optional)
Seasonings
- 3 teaspoons kosher salt
- 3/4 teaspoon ground black pepper
Others
- Cooking spray (for greasing)
Instructions
- Preheat and Prep: Preheat your oven to 400°F (200°C). Grease a 9×13 inch baking dish evenly with cooking spray to prevent sticking.
- Layer Potatoes and Onions: Arrange a layer of thinly sliced potatoes at the bottom of the dish. Sprinkle half of the sliced onions, 1 teaspoon of kosher salt, and 1/4 teaspoon of black pepper on top. Repeat the layering process, finishing with a final layer of potatoes sprinkled with the remaining salt and pepper.
- Make Sauce: In a medium bowl, whisk together the all-purpose flour and whole milk until smooth. Pour the milk mixture evenly over the layered potatoes and onions, adding a bit more milk if necessary so that the potatoes are almost covered.
- Add Cheese (Optional): If desired, sprinkle grated Romano cheese evenly over the top to add a sharp, savory flavor and create a golden crust.
- Bake: Place the baking dish uncovered in the preheated oven. Bake for 1 hour, or until the top is golden brown, the sauce is bubbly, and the potatoes are tender and crispy on the edges.
- Serve: Remove from the oven and let the scalloped potatoes cool for about 10 minutes before serving. This resting time helps the sauce thicken for the perfect creamy texture.
Notes
- Use thin potato slices between 1/8 to 1/4 inch for even cooking and tender texture.
- Whole milk creates a rich creamy sauce but you can substitute with 2% milk for a lighter version.
- Romano cheese is optional but adds a lovely depth of flavor and crust; Parmesan can be used as a substitute.
- Letting the dish rest before serving allows the sauce to thicken and prevents it from being runny.
- To save time, you can prepare the layers ahead and refrigerate before baking.
- Prep Time: 15 minutes
- Cook Time: 1 hour
- Category: Side Dish
- Method: Baking
- Cuisine: American
