Cheesy French Onion Scalloped Potatoes

If you’ve ever found yourself torn between French onion soup and classic scalloped potatoes, this recipe is the perfect marriage of the two. It’s comfort food at its finest, with tender slices of potato layered between deeply caramelized onions and melty cheese, all baked to golden, bubbly bliss. The first bite hits you with that rich onion sweetness and creamy texture, while the browned cheesy top adds just the right amount of savory crunch.

Behind the Recipe

I first stumbled upon this dreamy idea during a chilly fall evening when I had leftover caramelized onions and some Yukon Golds that needed using. Instead of going the usual potato bake route, I infused the creamy base with the magic of French onion soup. The result? A dish that brought everyone to the table with wide eyes and empty plates in minutes. It’s been a staple ever since, especially when I want to impress without fuss.

Recipe Origin or Trivia

French onion soup has roots in France going back to the 18th century. It’s known for its deep, slow-cooked onion flavor and that glorious melted cheese crust. Scalloped potatoes, on the other hand, trace back to Europe too, often seen in English or French kitchens. Combining these two classics creates a hybrid dish that feels both familiar and new. It borrows the soulful essence of French cuisine while delivering the homey satisfaction of a potato casserole.

Why You’ll Love Cheesy French Onion Scalloped Potatoes

Let me tell you, this one’s a total game-changer. Here’s why:

Versatile: Serve it as a main or a side. It pairs beautifully with steak, roast chicken, or a fresh green salad.

Budget-Friendly: Onions, potatoes, and cheese go a long way without breaking the bank.

Quick and Easy: While it needs some time in the oven, prep is straightforward and mostly hands-off.

Customizable: Add mushrooms, swap cheeses, or sprinkle herbs on top. Make it yours.

Crowd-Pleasing: It’s got the wow factor. Trust me, everyone will ask for seconds.

Make-Ahead Friendly: Assemble it earlier in the day, then just pop it in the oven before dinner.

Great for Leftovers: It reheats like a dream and might even taste better the next day.

Chef’s Pro Tips for Perfect Results

You’re just a few small tricks away from potato perfection:

• Use a mandoline for perfectly thin, even slices that cook uniformly.
• Don’t rush the caramelizing of onions. Low and slow brings out their full sweetness.
• Mix cheeses for depth. Gruyère gives you nutty richness while mozzarella melts like a charm.
• Let the dish rest for 10 minutes before serving so the layers set properly.
• Add a splash of broth if it seems too thick during baking to keep things moist.

Kitchen Tools You’ll Need

Before you dive in, make sure you’ve got these handy:

Mandoline or sharp knife: For slicing those potatoes super thin.

Large skillet: To caramelize onions until they’re sweet and jammy.

Baking dish (9×13): The perfect size for layering everything evenly.

Mixing bowls: For prepping cheese, cream, and other goodies.

Aluminum foil: Helps prevent the top from over-browning before the inside is fully cooked.

Ingredients in Cheesy French Onion Scalloped Potatoes

This dish is all about layering flavor on flavor. Here’s what you’ll need:

1. Yukon Gold Potatoes: 3 pounds, thinly sliced. These hold their shape well and add a buttery texture.
2. Yellow Onions: 3 large, thinly sliced. The star of the show when caramelized properly.
3. Butter: 4 tablespoons. For sautéing onions and adding richness.
4. Olive Oil: 1 tablespoon. Helps prevent burning while cooking the onions.
5. Garlic: 2 cloves, minced. Adds depth and warmth.
6. Thyme: 1 teaspoon dried or 1 tablespoon fresh. Boosts the earthy flavor.
7. Beef Broth: 1 cup. Brings in that classic French onion soup vibe.
8. Heavy Cream: 1½ cups. For creamy, luscious layers.
9. Gruyère Cheese: 1½ cups shredded. Nutty and melty perfection.
10. Mozzarella Cheese: 1 cup shredded. Adds gooey stretch and creaminess.
11. Salt: 1½ teaspoons. To bring out all the flavors.
12. Black Pepper: 1 teaspoon. For balance and just the right bite.
13. Parmesan Cheese: ½ cup grated. For that sharp finishing touch on top.

Ingredient Substitutions

There’s always room for a twist if you’re missing something:

Yukon Gold Potatoes: Russet potatoes work too, just peel them.

Gruyère Cheese: Swiss or sharp white cheddar makes a great backup.

Beef Broth: Vegetable or mushroom broth if you want a vegetarian version.

Heavy Cream: Half-and-half or evaporated milk works in a pinch.

Parmesan Cheese: Pecorino Romano gives a saltier kick.

Ingredient Spotlight

Yellow Onions: These transform from sharp and pungent to golden, jammy, and sweet when caramelized low and slow. They’re essential to the flavor base.

Gruyère Cheese: This cheese melts beautifully and has a nutty richness that elevates the entire dish, making it taste luxurious without being overpowering.

Instructions for Making Cheesy French Onion Scalloped Potatoes

Here’s how we bring it all together in cozy, cheesy harmony:

1. Preheat Your Equipment:
Set your oven to 375°F (190°C). Lightly grease a 9×13-inch baking dish.

2. Combine Ingredients:
In a large skillet over medium heat, melt butter and olive oil. Add sliced onions and cook slowly for 25 to 30 minutes until deeply golden and soft. Stir in garlic and thyme for the final few minutes, then pour in beef broth and simmer until slightly reduced.

3. Prepare Your Cooking Vessel:
Layer a third of the sliced potatoes in the bottom of the prepared baking dish. Sprinkle with a bit of salt, pepper, and a third of the cheeses. Spoon over some caramelized onions and a splash of cream.

4. Assemble the Dish:
Repeat layers two more times, ending with a generous layer of cheese on top. Pour remaining cream evenly over the whole dish.

5. Cook to Perfection:
Cover with foil and bake for 35 minutes. Remove foil and continue baking for another 25 to 30 minutes until bubbly and golden.

6. Finishing Touches:
Let rest for 10 to 15 minutes out of the oven. Sprinkle with extra thyme or parsley if desired.

7. Serve and Enjoy:
Scoop into generous portions and get ready for some serious smiles at the table.

Texture & Flavor Secrets

This dish is all about contrast and comfort. The top is crisped with melted cheese and browned bits of onion, while each bite inside is velvety soft from cream-soaked potatoes and melty cheese. The sweet, earthy onions add depth, while the salty parmesan and nutty Gruyère round it all out.

Cooking Tips & Tricks

These little gems will make sure you nail it every time:

• Let the onions go low and slow for the best flavor.
• Use full-fat cream for the richest texture.
• Shred your own cheese for the smoothest melt.
• Cut potatoes evenly so everything cooks at the same pace.

What to Avoid

A few missteps can hold this dish back. Here’s how to stay on track:

• Overcrowding layers: Keep it even for proper cooking.
• Undercooked onions: Rushing them leaves bitterness.
• Using pre-shredded cheese: It won’t melt as well due to added starch.

Nutrition Facts

Servings: 8
Calories per serving: 430

Note: These are approximate values.

Preparation Time

Prep Time: 25 minutes
Cook Time: 60 minutes
Total Time: 1 hour 25 minutes

Make-Ahead and Storage Tips

You can prep everything up to 24 hours in advance, cover it, and refrigerate until ready to bake. Leftovers keep well in the fridge for 3 to 4 days. Reheat covered in the oven to maintain moisture. This dish also freezes surprisingly well in portions, perfect for future comfort food cravings.

How to Serve Cheesy French Onion Scalloped Potatoes

This dish shines on its own but is also a knockout next to a seared steak, roasted chicken, or even a crisp green salad. It’s a great centerpiece at potlucks or holiday tables too. A glass of dry white wine or a sparkling apple cider pairs beautifully.

Creative Leftover Transformations

Got leftovers? Here’s how to spin them:

• Breakfast Hash: Chop and reheat with eggs and herbs for a hearty breakfast.
• Potato Cakes: Form into patties, pan-fry, and top with sour cream.
• Soup Base: Blend into a creamy soup with extra broth and herbs.

Additional Tips

• Always taste your cream mixture before pouring. Seasoning makes a big difference.
• For a crisper top, broil the last 2 minutes of baking.
• Letting the dish rest before cutting helps the layers firm up.

Make It a Showstopper

Presentation matters. Serve it in a beautiful white ceramic dish, garnish with fresh thyme, and let those golden edges shine. A sprinkle of flaky salt on top right before serving takes it over the edge.

Variations to Try

• Mushroom Lover’s Version: Add sautéed mushrooms between layers.
• Herb Infused: Mix in rosemary, sage, or even chives.
• Spicy Twist: Add a pinch of red pepper flakes to the onions.
• Extra Cheesy: Swap in smoked gouda or fontina for a new cheese profile.
• Vegetarian Version: Use veggie broth and skip parmesan or use a veg-friendly substitute.

FAQ’s

Q1: Can I make this ahead of time?

A1: Yes, assemble it up to a day in advance and bake when ready.

Q2: Can I freeze it?

A2: Absolutely. Freeze in portions and reheat in the oven for best texture.

Q3: What type of potatoes work best?

A3: Yukon Golds are ideal but Russets are a great backup.

Q4: Can I use milk instead of cream?

A4: You can, but the texture won’t be as rich or velvety.

Q5: Is it gluten-free?

A5: Yes, there’s no flour in this version.

Q6: Can I add protein like chicken or ham?

A6: Definitely. Layer in some cooked chicken or diced ham for a full meal.

Q7: What’s the best cheese combo?

A7: Gruyère and mozzarella give you melt and flavor, plus parmesan on top for sharpness.

Q8: How do I know when it’s done?

A8: The top should be deeply golden and a knife should slide easily through the potatoes.

Q9: Can I use pre-cooked potatoes?

A9: It’s best to use raw slices for perfect layering and texture.

Q10: How do I store leftovers?

A10: In an airtight container in the fridge for up to 4 days or freeze for longer storage.

Conclusion

Cheesy French Onion Scalloped Potatoes bring together everything we love about comfort food: warmth, richness, and that soul-satisfying bite that lingers in your memory. Whether it’s a cozy Sunday dinner or a dish to impress at your next potluck, this one’s worth every bite.

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