Ingredients
Equipment
Method
- Preheat your oven to 190°C (375°F).
 - Lightly grease the 9x13 inch baking dish.
 - Peel and dice the potatoes into 1.5 cm (1/2 inch) cubes. Set aside.
 - In a large saucepan over medium heat, melt the butter. Whisk in the flour and cook for about 1 minute until lightly bubbling, but not browned.
 - Gradually whisk in the milk, stirring constantly to remove lumps. Cook for 3-4 minutes until the sauce thickens.
 - Stir in salt, pepper, garlic powder, and onion powder.
 - Remove the saucepan from heat. Add 230 g (2 cups) of shredded cheddar cheese and whisk until completely melted and smooth.
 - Stir in sour cream until well combined.
 - In a large mixing bowl, combine potatoes with the cheese sauce and mix until all potatoes are coated.
 - Pour the mixture into the prepared baking dish and spread evenly.
 - Sprinkle the remaining 110 g (1 cup) cheddar cheese evenly over the top.
 - Cover the dish with foil and bake for 35 minutes.
 - Uncover and bake for an additional 15 minutes, or until the cheese is golden and the potatoes are fork-tender.
 - Let cool for 10 minutes before serving.
 
Notes
For extra flavor, try adding cooked bacon bits or chopped green onions before baking.
Yukon Gold potatoes can be used for a creamier texture.
To make ahead, assemble the dish and refrigerate, then bake before serving.
Test potatoes with a fork for doneness; baking times may vary with different oven types.
