Ingredients
Equipment
Method
- Preheat oven to 375°F/190°C (gas mark 5) and butter a baking dish.
- Peel and slice the potatoes thinly, then layer them into the baking dish.
- In a saucepan over medium heat, melt butter and whisk in flour. Cook, stirring, until smooth. Gradually add milk and cream, whisking to avoid lumps.
- Season with onion powder, garlic powder, salt, and pepper. Bring to a boil, then simmer until thickened.
- Add cheese and stir until melted. Pour half the sauce over the potatoes. Cover with foil and bake for 30 minutes.
- Remove foil and pour the rest of the sauce over the potatoes. Bake for another hour or until golden and tender.
- Garnish with parsley and serve hot or warm.
Notes
Slice potatoes evenly with a knife or mandolin for best texture. Soaking slices in cold water helps remove starch. Try layering with bacon, mushrooms, or broccoli for variety. Swap cheeses like gruyere or parmesan for a deeper flavor, or add mustard powder for a subtle kick.