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The Boat Shed Kitchen

Au Gratin Potatoes

This au gratin potatoes recipe features thinly sliced potatoes layered with garlic-infused cream sauce and melty cheddar or Gruyère. Baked until golden and bubbly, it’s the ultimate crowd-pleasing comfort food—perfect for dinners, potlucks, and holiday tables.
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Prep Time 20 minutes
Cook Time 1 hour 10 minutes
Rest Time 15 minutes
Total Time 1 hour 45 minutes
Servings: 8
Calories: 360
Ingredients Method Notes

Ingredients
  

  • 2½ lbs russet or Yukon gold potatoes peeled and thinly sliced
  • 2 tbsp butter
  • 2 tbsp all-purpose flour
  • 1½ cups milk
  • 1 cup heavy cream
  • 2 cups shredded cheddar cheese or Gruyère
  • 2 garlic cloves minced
  • ½ tsp salt
  • ¼ tsp black pepper

Method
 

  1. Preheat oven to 375°F. Grease a 9x13-inch baking dish.
  2. Melt butter in a saucepan. Whisk in flour and cook for 1 minute.
  3. Slowly add milk and cream, whisking until thickened.
  4. Add garlic, salt, pepper, and nutmeg.
  5. Stir in cheese until smooth. Remove from heat.
  6. Layer half the potatoes in the dish. Pour half the sauce over. Repeat.
  7. See full steps with tips & photos → https://theboatshedcafe.com/au-gratin-potatoes/

Notes

  • Slice potatoes evenly using a mandoline for the most consistent texture.
  • Gruyère cheese adds a nutty flavor, while cheddar brings classic sharpness—choose what suits your taste.
  • A touch of freshly grated nutmeg can enhance the sauce beautifully.