French Onion Potatoes

Why You’ll Love This Recipe

With just a few pantry staples, this casserole delivers big flavor inspired by classic French onion soup. The combination of melted butter, onion soup mix, and rich Gruyere cheese creates a luscious dish with tender potatoes and a crispy cheesy top. It’s effortless to make, requires little hands-on time, and is a guaranteed crowd-pleaser for any occasion.

Ingredients

(Tip: You’ll find the full list of ingredients and measurements in the recipe card below.)

• 1 (10-oz) can French onion soup
• 1 (1-oz) envelope dry onion soup mix
• ½ cup (1 stick) butter, melted
• 2.5 lbs russet potatoes
• 2 cups shredded Gruyere cheese

Directions

1. Preheat oven to 350°F (175°C).
2. Peel and dice the russet potatoes into bite-sized pieces.
3. In a large bowl, mix the French onion soup, dry onion soup mix, and melted butter until well combined.
4. Add the diced potatoes to the bowl and toss to coat them evenly in the soup mixture.
5. Transfer the potato mixture to a greased baking dish, spreading it out evenly.
6. Cover with foil and bake for 45 minutes.
7. Remove the foil, sprinkle shredded Gruyere cheese evenly over the potatoes.
8. Bake uncovered for an additional 15 minutes or until the cheese is melted and golden brown, and potatoes are tender when pierced with a fork.
9. Remove from oven and let cool slightly before serving.

Servings and Timing

This recipe serves 6 to 8 people.
Preparation time: 15 minutes
Cooking time: 1 hour
Total time: 1 hour 15 minutes

Variations

• Use Swiss or mozzarella cheese instead of Gruyere for a different flavor.
• Mix in sliced caramelized onions for extra sweetness and depth.
• Sprinkle fresh thyme or rosemary on top before baking for herbal notes.
• Use Yukon Gold potatoes for a creamier texture.

Storage/Reheating

Store leftover casserole in an airtight container in the refrigerator for up to 3 days.
Reheat in the oven at 350°F (175°C) covered with foil until warmed through or microwave individual portions until hot.

FAQs

Can I use other types of potatoes?

Yes, Yukon Gold or red potatoes can be used, but cooking times may vary slightly.

Can I prepare this dish ahead of time?

Yes, assemble the casserole and refrigerate before baking. Add extra baking time if baking from cold.

Is Gruyere cheese necessary?

Gruyere adds a rich, nutty flavor, but Swiss, mozzarella, or cheddar can be used as alternatives.

How do I know when the potatoes are done?

Potatoes are tender when a fork easily pierces through them.

Can I make this recipe dairy-free?

You can substitute the butter and cheese with dairy-free alternatives, but flavor and texture will differ.

Can I add vegetables?

Yes, add sliced mushrooms or bell peppers for extra flavor and nutrition.

How do I prevent the casserole from drying out?

Cover with foil during most of the baking time to retain moisture.

Can I freeze leftovers?

Yes, freeze in an airtight container for up to 2 months. Thaw overnight before reheating.

What can I serve with French Onion Potatoes?

They pair well with roasted meats, grilled chicken, or a simple green salad.

Can I use fresh onions instead of onion soup mix?

You can sauté fresh onions and add them, but the soup mix adds seasoning and depth difficult to replicate exactly.

Conclusion

French Onion Potatoes is a flavorful, cheesy casserole that transforms simple ingredients into a comforting, crowd-pleasing side dish. Easy to make with minimal effort, it’s perfect for family dinners, holidays, or any time you crave rich, satisfying potatoes with a savory onion twist.

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