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French Onion Potatoes – Cheesy, Savory & Perfect for Cozy Dinners!

These French Onion Potatoes are a mouthwatering twist on classic comfort food! Tender potatoes are baked with caramelized onions, melted Gruyère or Swiss cheese, and a rich beefy broth for that signature French onion soup flavor—without the soup. Whether served as a holiday side dish, weeknight indulgence, or potluck favorite, this recipe is easy to make and guaranteed to impress. Save it for your next cozy dinner or crowd-pleasing gathering!
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Prep Time 25 minutes
Cook Time 1 hour
Total Time 1 hour 25 minutes
Course Side Dish
Cuisine American comfort food with French-inspired flavors
Servings 8
Calories 300 kcal

Equipment

  • Large skillet
  • 9x13 baking dish or casserole dish
  • Sharp knife & cutting board
  • Cheese grater
  • Foil
  • Optional: ramekins for individual servings

Ingredients
  

  • 2 lbs potatoes (Yukon Gold or Russet), thinly sliced
  • 2 large onions, thinly sliced
  • 2 tbsp butter or olive oil
  • 1 packet onion soup mix or 1 cup condensed French onion soup
  • 1 cup beef or vegetable broth
  • 1 cup shredded Gruyère cheese (or mix of cheddar, Swiss, mozzarella)
  • ½ cup sour cream or heavy cream
  • Salt & pepper to taste
  • Optional garnish: fresh thyme, parsley, crispy onions

Instructions
 

  • Caramelize the onions: In a skillet over medium heat, cook onions in butter until golden and soft (20–25 minutes). Deglaze with broth or sherry for extra flavor.
  • Prepare potatoes: Slice evenly and pat dry.
  • Mix base: In a bowl, combine sour cream, soup mix or condensed soup, broth, and half the cheese. Stir in caramelized onions.
  • Layer casserole: In a greased baking dish, layer potatoes and onion mixture. Top with remaining cheese.
  • Bake: Cover with foil and bake at 375°F (190°C) for 30 minutes. Uncover and bake another 15–20 minutes until golden and bubbly.
  • Garnish & serve: Sprinkle with herbs or crispy onions. Serve hot.

Notes

  • For a vegetarian version, use veggie broth and skip meat-based soup.
  • To make it vegan, use dairy-free cheese and plant-based cream.
  • Bake in ramekins for portion control and elegant presentation.
  • Reheat uncovered in oven or air fryer to restore crisp topping.
  • Add mushrooms, bacon, or herbs for flavor twists.
Keyword caramelized onions, cheesy bake, Comfort Food, French onion potatoes, holiday side, potato casserole