Potatoes Au Gratin
side
Aug 1, 2026
Prep time: 45 min.
Cook time: 140 min.
Servings: 6-8
Ingredients
- Potatoes, 4 sliced thinly
- Onion, 1 sliced thinly
- Garlic, 1 clove chopped
- Butter, 3 tbs.
- Flour, 3 tbs.
- Black pepper, to taste
- Salt, 1/2 tsp.
- Milk, 2 cups
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Cheese, 1.5 cups shredded (Cabot New York Extra Sharp Cheddar)
- Parmesan, 1/3 cup grated
Equipment
- Grater
- 8x8 glass pan
- Aluminum foil
- Small pot
Prep
- Grate cheese
- Slice potatoes
- Slice onions
- Chop garlic
- Grease the pan with butter
Instructions
-
Preheat oven to 350F.
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Melt butter in pot.
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Add onions to pot and cook until soft.
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Stir in flour.
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Add milk 1/4 cup at a time.
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Cook until thick, ~3-5 minutes.
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Stir in 1/2 cup of cheddar cheese and all of the parmesan.
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Layer half of the potatoes in the glass pan.
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Season with black pepper.
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Layer onions, reserving as much sauce as possible.
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Layer remaining potatoes.
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Season with black pepper.
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Pour cheese sauce over potatoes.
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Sprinkle remaining cheese.
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Cover with aluminum foil.
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Bake for 1 hour.
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Remove aluminum and bake another 30 minutes.
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Let rest 5-10 minutes.