Potatoes “Au Gratin” Casserole

You’ll never miss the boxed version after trying these easy potatoes!

Serves: 4Hands-on: 25 minutesTotal: 1 hour 20 minutesDifficulty: Easy

Serves: 4


  • 4 medium potatoes, peeled and sliced
  • 1 medium onion, peeled and chopped
  • 1 Tbsp. vegan margarine
  • 2 Tbsp. all-purpose flour
  • 2 cups unsweetened soy milk
  • 2 tsp. onion powder
  • 1 tsp. garlic powder
  • 2 Tbsp. nutritional yeast
  • 1 tsp. lemon juice
  • ½ tsp. salt
  • ¾ tsp. paprika
  • ½ tsp. ground black pepper


  • Preheat oven to 375°F.
  • Arrange half the potato slices in a casserole or baking dish. Layer half of the onions on top of the potatoes.
  • Melt the margarine over low heat and add flour, stirring to make a paste. Add soy milk, onion powder, garlic powder, nutritional yeast, lemon juice, and salt, stirring to combine. Stir over low heat until sauce has thickened, about 2–3 minutes.
  • Pour half of sauce over potatoes and onions, then layer the remaining potatoes and onions on top of the sauce. Pour the remaining sauce on top.
  • Sprinkle with paprika and black pepper and top with bread crumbs or French-fried onions.
  • Cover and bake for 45 minutes and then an additional 10 minutes uncovered.