Potatoes Au Gratin Recipe

8 servings

Layers of thinly sliced potatoes smothered in a cheesy cream sauce topped with an extra layer of cheese, and baked until golden and bubbly. Classic potatoes au gratin is made with humble ingredients, can be made ahead, and is a budget-friendly way to feed a crowd!


Potatoes Onion Butter, garlic, flour Salt and pepper Milk Cheddar cheese

Arrange potatoes


Layer 1/2 of the sliced potatoes on the bottom of a greased 8x8 dish.

Add onions


Evenly disperse the sliced onion overtop potatoes then place the other half of the potatoes overtop.

Make cheese sauce


Melt butter over medium heat then add the garlic, whisk in flour, salt and pepper. Lower heat and whisk in milk then stir in cheese.

Add sauce to potatoes


Pour cheese sauce over layered potatoes.



Cover with foil and bake at 400 degrees for one hour. Remove foil and bake uncovered 20-30 minutes.

Rest then serve


Let the potatoes au gratin cool for 10 minutes before serving.

Make Ahead

Prep ahead by assembling the casserole then baking it covered for 30 minutes. Cool completely and store in fridge. When ready to serve, bring to room temp and bake uncovered 20-30 minutes.

Tap the link for full recipe details. Enjoy!