Ingredients
Equipment
Method
Step-by-Step Instructions
- Preheat the oven to 375°F (190°C) and grease a 9x13-inch baking dish with unsalted butter.
- Melt 4 tablespoons of unsalted butter in a medium saucepan over medium heat. Stir in ¼ cup of all-purpose flour to create a roux, cooking for about 1 minute.
- Gradually whisk in 1 cup of heavy cream and 1 cup of milk, cooking for 3-5 minutes until slightly thickened. Add garlic powder, salt, and black pepper.
- Layer half of the sliced russet potatoes in the greased dish, add half of the sliced onion, pour half of the cheese sauce, and sprinkle half of the cheddar cheese.
- Repeat the layer process with remaining potatoes, onions, and cheese sauce. Finish with the remaining cheddar cheese on top.
- Cover the dish with aluminum foil and bake for 45 minutes.
- Remove foil and bake uncovered for an additional 15-20 minutes until golden brown and bubbly.
- Let cool for 10 minutes before serving.
Nutrition
Notes
Ensure layering of potatoes and onions is even for consistent cooking and flavor. Allow the dish to rest after baking for easier slicing.
