Ingredients:
- 4 to 5 large potatoes, peeled and thinly sliced
- 1 medium onion, thinly sliced
- 3 tablespoons butter
- 3 tablespoons all-purpose flour
- 2 cups milk
- 1 cup shredded cheddar cheese
- 1 teaspoon salt
- 1/2 teaspoon black pepper
- 1/2 teaspoon garlic powder
- 1/2 teaspoon dried thyme (optional)
- Chopped fresh parsley for garnish (optional)
Instructions:
- Preheat your oven to 375°F (190°C). Grease a 9×13-inch baking dish with butter or cooking spray.
- In a large skillet, melt the butter over medium heat. Add the sliced onions and cook until they become translucent and slightly caramelized, about 5 minutes.
- Sprinkle the flour over the onions and butter, and stir well to combine. Cook for an additional 1 to 2 minutes, stirring constantly.
- Gradually pour in the milk while stirring continuously. Cook the mixture until it thickens and starts to bubble. This will form a creamy white sauce.
- Reduce the heat to low, then add the shredded cheddar cheese to the sauce. Stir until the cheese has melted completely and the sauce is smooth.
- Season the sauce with salt, black pepper, garlic powder, and dried thyme (if using). Stir well to incorporate the spices.
- Arrange a layer of sliced potatoes in the greased baking dish, slightly overlapping them. Pour a portion of the cheese sauce over the potatoes, spreading it evenly to cover them.
- Repeat the process, creating additional layers of potatoes and sauce until all the ingredients are used, finishing with a layer of sauce on top.
- Cover the baking dish with foil and place it in the preheated oven. Bake for about 45 minutes.
- After 45 minutes, remove the foil and continue baking for an additional 20 to 25 minutes or until the potatoes are tender and the top is golden brown and bubbly.
- Once done, remove the scalloped potatoes from the oven and let them cool for a few minutes. Garnish with chopped fresh parsley, if desired, before serving.
- Enjoy!