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French Onion Potatoes Recipe

French Onion Potatoes Recipe

5 Stars 4 Stars 3 Stars 2 Stars 1 Star 5 from 125 reviews
  • Author: Megane
  • Prep Time: 15 minutes
  • Cook Time: 45 minutes
  • Total Time: 1 hour
  • Yield: 10 servings
  • Category: Side Dish
  • Method: Baking
  • Cuisine: French
  • Diet: Vegetarian

Description

These French Onion Potatoes are a delicious twist on classic scalloped potatoes. Layers of thinly sliced potatoes and onions are smothered in a rich, cheesy onion sauce and baked to perfection. A comforting and flavorful side dish for any occasion.


Ingredients

Russet Potatoes:

4

Yukon Gold Potatoes:

5-6 (~1 lb)

White Onion:

1 medium sized

Butter:

2 tbsp

All-Purpose Flour:

2 tbsp

Milk:

1 cup (2% Fairlife)

Onion Dip Mix:

1 packet

Sharp White Cheddar Cheese (shredded):

1/2 cup

Gruyere Cheese (shredded):

1 block (6 oz)

Worcestershire Sauce:

1 tsp

Onion Powder:

1/2 tsp

Minced Dried Onion:

1 tsp

Green Onion or Fresh Rosemary:

For garnish


Instructions

  1. Prepare Ingredients: Finely slice all onions and potatoes into thin coins. If no mandoline, use a sharp knife. Slice evenly (~¼” thick).
  2. Shred Cheeses: Grate Gruyere and sharp white cheddar.
  3. Make Cheese Sauce: Heat pot, melt butter, whisk in flour and milk to make roux. Add in cheeses, salt, onion dip mix, onion powder, and Worcestershire sauce. Whisk until smooth.
  4. Assemble: Preheat oven. Layer ⅓ of cheese mixture in a greased casserole dish. Stack potatoes and onions, pour cheese sauce over, and top with remaining gruyere.
  5. Bake: Cover and bake at 350°F for 45 mins. Broil uncovered for 3-5 mins until golden.
  6. Garnish and Serve: Top with rosemary and green onion. Serve warm.

Notes

  • If using a round dish, arrange potatoes in a circular pattern. For square or rectangle dishes, align in columns.
  • Use a larger dish or split into two pans to prevent cheese overflow. Place a tray under for spillage.
  • Spray foil with cooking spray to prevent cheese sticking. Store covered in the dish for up to 4 days or freeze for up to 3 months.

Nutrition

  • Serving Size: 1 serving
  • Calories: 320
  • Sugar: 3g
  • Sodium: 550mg
  • Fat: 15g
  • Saturated Fat: 9g
  • Unsaturated Fat: 5g
  • Trans Fat: 0g
  • Carbohydrates: 35g
  • Fiber: 3g
  • Protein: 12g
  • Cholesterol: 45mg