Ingredients
Scale
- 30 oz (850 g) frozen shredded hashbrowns, thawed
- 4 tablespoons (56 g) unsalted butter, plus 3 tablespoons more, melted, for the topping
- 1 small yellow onion, finely diced, about 1 cup
- 2 garlic cloves, minced
- 1/4 cup (30 g) all-purpose flour
- 1 1/2 cups (360 ml) whole milk
- 1 cup (240 ml) low sodium chicken broth
- 1 cup (240 g) sour cream, at room temperature
- 3 cups (340 g) sharp cheddar, freshly shredded, divided
- 1 teaspoon fine salt
- 1/2 teaspoon black pepper
- 1/2 teaspoon onion powder
- 1 pinch sweet paprika
- 2 cups cornflakes, lightly crushed
Instructions
- Thaw the hashbrowns completely. Gather them in a clean kitchen towel and squeeze hard over the sink, twice, until almost no liquid drips out.
- Heat the oven to 350°F (175°C). Butter a 9×13 inch baking dish.
- Melt the 4 tablespoons of butter in a large saucepan over medium heat. Cook the onion 4 to 5 minutes, until soft and sweet. Add the garlic for 30 seconds.
- Sprinkle in the flour and stir for 1 full minute. Whisk in the milk and broth in a slow stream and simmer 3 to 4 minutes, until the sauce thickly coats a spoon.
- Take the pan off the heat. Stir in 2 cups of the cheddar until melted and glossy. Fold in the sour cream, salt, pepper, onion powder, and paprika.
- Fold the squeezed dry hashbrowns into the sauce until every shred is coated. Spread evenly in the prepared dish.
- Scatter the remaining 1 cup of cheddar over the top. Toss the crushed cornflakes with the 3 tablespoons of melted butter and cover the casserole evenly.
- Bake, uncovered, for 40 to 45 minutes, until the top is deep golden and the sauce bubbles thickly at the edges.
- Rest 10 full minutes before scooping so the sauce sets and the first scoop holds its shape.
- Prep Time: 20 minutes
- Cook Time: 45 minutes