Au Gratin Potatoes are cheesy, creamy side dish perfection everyone is sure love. Tender sliced potatoes smothered in a luscious cream sauce made with two kinds of cheese and baked until golden and bubbly!
2.5poundsrusset potatoes (starchy potatoes)sliced thinly (about ⅛ inch thick) into rounds
1 ½cupsshredded sharp cheddar cheesedivided (reserving 1 cup for top)
1 ½cupsshredded Gruyere cheese
1 ½cupsheavy cream
½cupmilk
1 ½tablespoonsflour
2clovesgarlicminced
¼teaspoonsalt
⅛teaspoonblack pepper
2teaspoonsthyme leavesoptional
butter for baking dishabout 1 tablespoon
fresh chopped parsley to garnish
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Instructions
Preheat the oven to 375°F and butter a 2.5 to a 3-quart baking dish or cast iron skillet.
Wash and thinly slice Potatoes with a knife or mandoline slicer. Place sliced potatoes fanned out in rows (slanted rows) in the bottom of the casserole or baking dish.
In a medium bowl mix together the cheeses. Reserve ¾ cup for the top.
Melt butter in a saucepan or skillet over medium heat, slowly whisk in flour and cook for 2 to 3 minutes. Slowly whisk in heavy cream, milk, garlic, salt, pepper, and thyme leaves (optional). Heat until thick and bubbly. Remove from heat and stir in 1 ¾ cups cheese mixture until melted and creamy.
Spoon or pour cheese sauce over the potatoes. Spray the inside of aluminum foil and cover the baking dish. Bake for 60 to 70 minutes or until potatoes are tender. (Test with a knife to fork tender)
Remove cover and top with remaining cheese. Then bake uncovered for 15 to 20 minutes until the cheese is golden and bubbly.