Ingredients
Method
- Preheat your oven to 375°F (190°C) and generously butter a 9x13-inch baking dish. Wash and peel the potatoes, then slice them into ¼-inch thick rounds. Pat the slices dry with paper towels to remove excess moisture.
- In a large bowl, whisk together the melted butter, heavy cream, sour cream, garlic powder, salt, and pepper until smooth and fragrant. Add 1½ cups of the cheddar cheese and all the Parmesan, reserving the remaining cheddar for topping.
- Arrange half the potato slices in your prepared baking dish, overlapping them slightly. Pour half the cream mixture over the potatoes, using a spatula to ensure even coverage. Repeat with remaining potatoes and cream mixture.
- Sprinkle the reserved cheddar cheese evenly over the top, followed by the panko breadcrumbs. Cover tightly with foil and bake for 30 minutes, then remove the foil and continue baking for 15 minutes until the top is golden brown and bubbling.
- Remove from the oven when a knife slides through the layers with minimal resistance and the top is beautifully bronzed. Let it rest for 10 minutes. Top with crumbled bacon and fresh green onions just before serving.
Notes
Can be assembled the night before and refrigerated - add 10-15 extra minutes to baking time when cooking from cold. Let rest for 10 minutes after baking to allow layers to set properly. Store leftovers in refrigerator for up to 4 days. Can be frozen for up to 3 months.
