Ingredients
- 3 baking potatoes (about 2 pounds)
- canola oil
- 1 1/2 cups sour cream
- 1/4 cup finely chopped chives
- plus extra for garnish
- 3 cloves garlic
- pressed or minced
- 2 tablespoons grated onion (about 1/2 an onion)
- 1 1/2 teaspoons kosher salt
- 1/4 teaspoon black pepper
- 1 1/4 cups grated sharp Cheddar cheese
- about 4 ounces
- 1 1/4 cups grated Gruyere cheese
- or more Cheddar
- about 4 ounces
Instructions
- Heat oven to 375 degrees.
- Rub potatoes lightly with oil, place on a baking sheet and bake 60 to 80 minutes, until just tender all the way through.
- Let cool and refrigerate overnight or up to 3 days.
- (Refrigeration gives the potatoes the right texture.)
- Heat oven to 350 degrees.
- In a large bowl, combine sour cream, chives, garlic, onion, salt and pepper.
- Using a box grater, coarsely grate potatoes with skins on.
- (Most of the skin will peel off; discard it.)
- Add grated potatoes to sour cream mixture, and gently toss to combine.
- Add 1 cup Cheddar and 1 cup Gruyere and mix gently.
- Transfer to an 8-by-8-inch-square baking dish.
- Sprinkle remaining cheese on top.
- Bake until hot, bubbly and lightly browned around the edges, 30 to 40 minutes.
- Let cool 10 minutes before serving, sprinkled with chives.
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