French Onion Potato Bake Recipe – Easy Cheesy Casserole

If you love French onion soup and cheesy potato casseroles, this Easy French Onion Potato Bake Recipe is the perfect combination of both!  Imagine layers of tender potatoes, caramelized onions, and gooey melted cheese, all baked to golden perfection in a creamy, savory sauce.

This dish is a must-try for fans of French flavors, comfort food, and easy-to-make dinner recipes. Whether you’re preparing a cozy weeknight dinner or need a crowd-pleasing side dish, this French Onion Potato Bake will impress everyone at the table.

Let’s dive into the full recipe and learn how to make this irresistible dish at home!

Ingredients for French Onion Potato Bake

Main Ingredients

To make this delicious French Onion Potato Bake, you’ll need:

• 6 medium potatoes, thinly sliced (Russet or Yukon Gold)
• 2 large yellow onions, thinly sliced
• 2 tablespoons unsalted butter
• 2 tablespoons olive oil
• 1 teaspoon salt
• ½ teaspoon black pepper
• 2 tablespoons fresh thyme, chopped
• 1 cup heavy cream
• 2 cans French onion soup (or homemade)
• 2 cups shredded Gruyère cheese (or Swiss cheese)
• 1 cup shredded mozzarella cheese
• ½ cup crispy fried onions (for topping)

Optional Ingredients & Substitutions

• Swap Gruyère cheese for cheddar, Swiss, or fontina.
• Use red potatoes instead of Russet for a slightly firmer texture.
• Substitute French onion soup with beef broth + caramelized onions.
• Add garlic powder or onion powder for extra depth of flavor.

How to Make French Onion Potato Bake – Step by Step

Step1: Preheat the Oven & Prepare Ingredients

• Preheat your oven to 375°F (190°C).
• Grease a 9×13-inch baking dish with butter or non-stick spray.
• Thinly slice potatoes and onions (use a mandoline slicer for even slices).

Step2: Caramelize the Onions

• In a large skillet, heat butter and olive oil over medium-low heat.
• Add the sliced onions, sprinkle with salt, and cook slowly for 25-30 minutes, stirring occasionally, until they turn deep golden brown.
• Stir in fresh thyme, then remove from heat and set aside.

Step3: Assemble the Bake

• Arrange half of the sliced potatoes in the greased baking dish.
• Spread half of the caramelized onions on top.
• Pour one can of French onion soup and half the heavy cream over the layers.
• Sprinkle half of the shredded Gruyère and mozzarella cheese on top.
• Repeat the layers with the remaining potatoes, onions, soup, and cream.
• Finish by sprinkling the remaining cheese on top.

Step4: Bake Until Golden Brown

• Cover the dish with aluminum foil and bake for 45 minutes.
• Remove the foil, top with crispy fried onions, and bake uncovered for another 15 minutes, or until the top is golden brown and bubbly.

Step5: Rest & Serve

• Let the dish rest for 10 minutes before serving.
• Garnish with fresh thyme or parsley, and serve warm.

Helpful Tips for the Best French Onion Potato Bake

• Use starchy potatoes like Russet or Yukon Gold for a creamy texture.
• Slice potatoes evenly (about ⅛-inch thick) to ensure even cooking.
• Slowly caramelize the onions over low heat for maximum sweetness.
• Cover with foil for the first 45 minutes to prevent drying out.
• Let the bake rest before cutting to allow flavors to meld together.

Cooking Tips for the Best French Onion Potato Bake

Best Cheese Choices

For a perfectly melty, creamy texture, use a combination of cheeses:

• Gruyère – Nutty and rich, perfect for French onion flavors.
• Mozzarella – Adds stretchy meltiness.
• Swiss or Fontina – Enhances the savory taste.

How to Get Crispy Edges

• Bake uncovered for the last 15 minutes.
• Add breadcrumbs for extra crunch.
• Place under the broiler for 3-5 minutes for a golden, crispy top.

Serving Suggestions for French Onion Potato Bake

• Main Dish: Serve with a side of steamed vegetables or a fresh salad.
• Side Dish: Pair with grilled chicken, steak, or roasted pork.
• Vegetarian Option: Serve with a creamy mushroom sauce or sautéed greens.

Nutritional Information (Per Serving)

Nutrient	Amount
Calories	385 kcal
Total Fat	19g
Carbohydrates	42g
Fiber	3g
Protein	14g
Sodium	580mg

Storage & Leftovers for French Onion Potato Bake

How to Store Leftovers

• Let the bake cool completely.
• Store in an airtight container in the refrigerator for up to 3 days.

How to Reheat

• Microwave: Heat in 30-second intervals until warm.
• Oven: Cover with foil and bake at 300°F (150°C) for 15 minutes.

Frequently Asked Questions (FAQs) for French Onion Potato Bake

1. Can I make French Onion Potato Bake ahead of time?

Yes! Assemble the dish up to 24 hours in advance, cover, and refrigerate. Bake when ready!

2. What’s the best cheese substitute for Gruyère?

You can use Swiss, fontina, sharp cheddar, or provolone.

3. Can I freeze this potato bake?

Yes! Assemble the dish, cover tightly, and freeze for up to 2 months. Thaw overnight before baking.

4. Can I use sweet potatoes instead of regular potatoes?

Yes! Sweet potatoes add a natural sweetness and are a great alternative.

Related Recipes for French Onion Potato Bake Lovers

• The Best Patty Melt Ever with a Special Sauce Twist
• Boston Cream Pie Cheesecake – Indulgent Dessert Recipe

Conclusion: Try This French Onion Potato Bake Tonight!

This Easy French Onion Potato Bake Recipe is the perfect comfort food that combines creamy potatoes, caramelized onions, and melty cheese into one irresistible dish.

Give it a try! Let us know how you liked it in the comments below. Did you add any special twists? Share your feedback! 👇

Happy Cooking!

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