French Onion Potatoes
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French onion potatoes are a tasty twist on classic potato dishes. They mix the rich flavors of French onion soup with creamy, cheesy potatoes. This easy recipe takes just 10 minutes to prep and serves 6 people.

You’ll love how the potatoes soak up all the savory goodness from the soup and onion mix. The melted Gruyere cheese on top adds a nice gooey texture. It’s comfort food at its finest! With 356 calories per serving, this side dish is sure to be a hit at your next meal.

Exact Ingredients List
Here’s what you’ll need to make these tasty French onion potatoes:
- 2 pounds Russet potatoes
- 1 can (10.5 ounces) condensed French onion soup
- 1 packet (1 ounce) dry onion soup mix
- 1/2 cup unsalted butter, melted
- 1 teaspoon dried thyme or rosemary
- 1 1/2 cups shredded Gruyere cheese
- 2 tablespoons fresh parsley, chopped
Make sure to peel and cut your potatoes into 1-inch cubes before you start. This will help them cook evenly and soak up all the yummy flavors.
Don’t forget to grease your 9×13-inch baking dish. This step is key to prevent sticking and make cleanup a breeze.
The Gruyere cheese adds a rich, nutty flavor that pairs perfectly with the onion soup. If you can’t find Gruyere, Swiss cheese works great too.
Fresh parsley gives a nice pop of color and freshness to the finished dish. It’s the perfect finishing touch!

Instructions
Preheat your oven to 400°F. Grease a 9×13-inch baking dish with butter or cooking spray.
In a large bowl, mix the French onion soup, dry onion soup mix, melted butter, and thyme. Add the potato cubes and stir well to coat them evenly.
Pour the potato mixture into your greased baking dish. Spread it out in an even layer. Cover the dish tightly with foil.
Bake the covered potatoes for 30 minutes. Then, take off the foil and keep baking for 40-45 more minutes. Stir the potatoes halfway through this time.
Check if the potatoes are very soft. If they are, sprinkle the shredded gruyere cheese on top. Put the dish back in the oven for 5-10 minutes until the cheese melts and bubbles.
Take the potatoes out of the oven. Let them cool for 5-10 minutes. Sprinkle chopped parsley on top before you serve. Enjoy your hot, cheesy French onion potatoes!

Possible Substitutes List
You can easily swap out some ingredients in this French onion potato recipe. Here are some tasty options:
Potatoes:
- Yukon Gold (creamier texture)
- Red potatoes (hold shape well)
- Sweet potatoes (for a twist)
Cheese:
- Swiss cheese
- Cheddar cheese
- Fontina cheese
Herbs:
- Dried oregano
- Fresh chives
- Dried basil
If you don’t have French onion soup, try beef broth mixed with caramelized onions. For a vegetarian version, use vegetable broth instead.
No dry onion soup mix? Use 3 tablespoons of onion powder and 1 teaspoon of garlic powder.
You can replace butter with olive oil for a different flavor. Or use ghee for a nuttier taste.
Want to add some crunch? Top with crispy fried onions or breadcrumbs before the final bake.
These swaps let you customize the dish to your taste or use what you have on hand. Feel free to mix and match!
How To Make It Diabetes-Friendly
To make this dish more suitable for people with diabetes, you can try a few simple tweaks. First, swap the regular potatoes for sweet potatoes. They have a lower glycemic index and more fiber.
Cut down on the butter and cheese. Use just 1/4 cup of butter and 3/4 cup of cheese instead. This will reduce the fat and calorie content.
For the soup, pick a low-sodium version. You can also use only half the packet of onion soup mix to cut back on salt.
Add more veggies to boost nutrition and fiber. Try mixing in some sliced mushrooms or bell peppers.
Steam the potatoes first before baking. This cooking method helps keep blood sugar levels steadier.
Watch your portion size. Stick to a 1/2 cup serving to keep carbs in check.
Here’s a quick breakdown of the changes:
- Sweet potatoes instead of russet
- 1/4 cup butter
- 3/4 cup cheese
- Low-sodium soup
- 1/2 packet onion mix
- Added veggies
- Steamed, then baked
- 1/2 cup portions
These simple swaps make the dish more diabetes-friendly while keeping the yummy French onion flavor.
Tips, Tricks & Storing
Cut your potatoes into even-sized cubes for consistent cooking. This helps them cook at the same rate and gives you perfectly tender potatoes throughout the dish.
For extra flavor, try adding some minced garlic or a splash of white wine to the soup mixture. These ingredients can add depth to the already rich taste of the French onion potatoes.
You can make this dish ahead of time. Prepare everything up to the cheese-adding step, then cover and refrigerate. When ready to serve, add the cheese and bake until hot and bubbly.
Leftover French onion potatoes can be stored in an airtight container in the fridge for up to 3 days. Reheat in the oven at 350°F for about 15-20 minutes, or until heated through.
For a crispy top, broil the dish for 2-3 minutes after adding the cheese. Keep a close eye on it to prevent burning.
If you don’t have Gruyere, you can use Swiss cheese or a mix of Swiss and Parmesan as a tasty alternative.
To make this dish vegetarian, use vegetable broth instead of the French onion soup. Add some caramelized onions for that classic French onion flavor.