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au gratin potatoes
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Au Gratin Potatoes

This au gratin potatoes recipe is forgiving and uses only 6 ingredients (plus salt & pepper)! Slice potatoes and put them in a casserole dish while the other ingredients are cooking on the stovetop. Combine ingredients, and put in oven. Potatoes au gratin is an easy side dish.
Course Side Dish
Cuisine American
Keyword au gratin potatoes, au gratin potatoes recipe, easy au gratin potatoes, recipe for au gratin potatoes
Prep Time 10 minutes
Cook Time 1 hour
Servings 8

Ingredients

  • 6 - 8+ potatoes depending on the size of your dish and potatoes
  • 4 tablespoons butter ¼ stick butter
  • 1 onion
  • 4 tablespoons ¼ cup all-purpose flour
  • 2 cups milk
  • cups cheddar cheese or gruyere cheese, Mexican cheese blend, etc.
  • teaspoons salt
  • ¼ teaspoon pepper
  • Vegetable oil or butter to coat casserole dish

Instructions

  • Preheat oven to 350ºF.
  • Lightly coat bottom and sides of casserole dish.
  • Wash and chop onion.
  • Put butter in pan on medium low and melt. Add onion and cook for 2 minutes.
  • In the meantime, wash and slice potatoes. Put in casserole dish.
  • Add flour, salt, and pepper, and combine with onions.
  • Slowly pour in milk. Cover pan so milk heats. Cook for 2 minutes or until boiling.
  • Stir until mixture thickens. Remove from heat.
  • Add in cheese, and combine.
  • Pour mixture on top of potatoes. Combine so the potatoes are covered.
  • Cover casserole dish with aluminum foil or oven-safe plastic cover. Bake for 50 minutes (less if using 8x8 or 9x9).
  • Remove foil and continue cooking an additional 10 minutes.
  • Remove from oven, and check for doneness with a fork. Return to oven if potatoes are not tender.
  • Serve.

Notes

When butter is warming, chop the onion. When the mixture is cooking, slice the potatoes.
Potatoes au gratin are delicious on their own, or you can add rosemary, sage, thyme, garlic powder, or ham, bacon, etc.
Store in fridge covered for 3 - 5 days.