Creamy, tender scalloped potatoes baked in a velvety garlic-onion cream sauce, with optional cheese for extra richness. A classic, comforting side dish for holidays and family meals.
2½ lbs Russet or Yukon Gold potatoes, sliced ⅛-inch thick
2 tablespoons butter
1 small onion or 2 shallots, finely chopped
2 cloves garlic, minced
2 tablespoons all-purpose flour
1½ cups heavy cream
1½ cups whole milk
1½ teaspoons salt
½ teaspoon black pepper
Pinch of nutmeg (optional)
½ cup grated Parmesan or Gruyère (optional)
Extra butter for dotting top (optional)
Preheat oven to 375°F. Butter a 9×13-inch dish.
Melt butter in saucepan. Add onion, cook 5 min. Add garlic; cook 30 sec.
Stir in flour. Cook 1–2 min. Slowly whisk in cream and milk.
Add salt, pepper, nutmeg. Simmer until thickened, 5–7 min.
Layer half of potatoes, pour half of sauce. Repeat. Add cheese if using.
Cover with foil. Bake 45 min. Uncover, bake 25–30 min more.
Rest 10–15 min before serving.
Make ahead and reheat for easy holiday prep.
Add herbs or smoked paprika for variation.
Use gluten-free flour if needed.