Easy Potatoes Au Gratin with Creamy Cheese Sauce
These easy potatoes au gratin are the ultimate comfort food, perfect for dinner recipes or cozy side dishes.
Servings: 6 servings
Ingredients
- 2 1/2 lbs russet potatoes, peeled and sliced 1/4 inch thick
- 1 small onion, finely diced
- 3 tablespoons butter
- 3 tablespoons flour
- 2 cups whole milk, heated
- 1/2 teaspoon salt
- 1/4 teaspoon pepper
- 1 1/2 cups sharp cheddar cheese, shredded
- 1/2 cup Monterey Jack cheese, shredded
- Extra cheese for topping (optional)
- Butter for greasing the baking dish
Instructions
- Preheat oven to 375°F and butter a 1.5 to 2-quart casserole dish.
- In a medium saucepan over medium heat, melt the butter and add diced onion. Cook until soft, about 5 minutes.
- Stir in flour and cook for another minute, then slowly whisk in the heated milk until smooth.
- Bring mixture to a simmer, stirring constantly until thickened.
- Stir in salt, pepper, and both cheeses until melted and smooth.
- Layer half of the sliced potatoes in the prepared baking dish. Pour half the cheese sauce over the potatoes. Repeat with remaining potatoes and sauce.
- Cover with foil and bake for 45 minutes. Remove foil, sprinkle with extra cheese if desired, and bake uncovered for another 15–20 minutes until golden and bubbly.
- Let cool slightly before serving.