French Onion Mashed Potatoes

These French Onion Mashed Potatoes elevate the traditional mashed potatoes with the rich, savory flavors of caramelized onions. The buttery, creamy potatoes combined with the deep, sweet onion flavor and a touch of cheese make this the ultimate side dish. It’s perfect for holiday dinners, cozy family meals, or whenever you’re craving something extra special!

My family is obsessed with mashed potatoes, but one night I wanted to bring a new flavor to our dinner table. Inspired by my love for French onion soup, I decided to combine it with mashed potatoes—and the results were phenomenal! My husband, who’s usually picky about changing up his classic mashed potatoes, couldn’t stop praising them, and even my little ones went back for seconds. Now, these French Onion Mashed Potatoes have become our favorite side dish, especially for holiday gatherings!

Why You’ll Love French Onion Mashed Potatoes

•Rich & Savory: The caramelized onions bring an irresistible depth of flavor.

•Creamy & Cheesy: Buttery mashed potatoes with melted cheese make this an ultimate comfort food.

•Great for Special Occasions: Perfect side dish for Thanksgiving, Christmas, or any celebration.

•Simple to Make: With a few ingredients and some patience for caramelizing onions, you’ll have a deliciously impressive dish.

Ingredients Notes for French Onion Mashed Potatoes

•Potatoes: Use Yukon Gold or Russet potatoes for a creamy texture.

•Onions: Yellow onions are best for caramelizing, as they develop a sweet, rich flavor.

•Butter: Adds richness to both the mashed potatoes and the caramelized onions.

•Cheese: Gruyere or Swiss cheese melts beautifully and complements the onion flavor perfectly.

•Cream: Heavy cream or whole milk adds the right amount of creaminess to the mashed potatoes.

Recipe Steps

1. Caramelize the Onions:

•Slice 2-3 large yellow onions thinly.

•Melt 2 tbsp of butter in a skillet over medium heat.

•Add onions, season with a pinch of salt, and cook, stirring occasionally, until caramelized (about 20-30 minutes). Set aside.

2. Cook the Potatoes:

•Peel and cut 2 lbs of potatoes into chunks.

•Boil in salted water until tender, about 15-20 minutes. Drain well.

3. Mash the Potatoes:

•Add 4 tbsp of butter, ½ cup of warm cream, and a pinch of salt to the drained potatoes.

•Mash until smooth and creamy.

4. Combine with Caramelized Onions:

•Gently fold in the caramelized onions and 1 cup of shredded Gruyere or Swiss cheese.

•Mix until well combined, letting the cheese melt into the potatoes.

5. Serve:

•Garnish with extra caramelized onions or a sprinkle of chopped parsley. Serve warm.

Storage Options

•Refrigerate: Store leftovers in an airtight container in the refrigerator for up to 3 days.

•Reheat: Warm in a microwave or on the stovetop with a splash of milk or cream to maintain the creamy texture.

Variations & Substitutions

•Add Herbs: Stir in fresh thyme or rosemary for an extra herby flavor.

•Make It Cheesy: Add more cheese, like cheddar or mozzarella, for a super cheesy version.

•Use Garlic: Add roasted garlic to the mashed potatoes for an even richer flavor profile.

French Onion Mashed Potatoes

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Course: Side Dish

Kitchen: American, French

Prep Time: 15 minutes minutes

Cook Time: 30 minutes minutes

Total Time: 45 minutes minutes

Ingredients

 

• ▢ 2 lbs russet or Yukon Gold potatoes peeled and cubed
• ▢ 1 large onion thinly sliced
• ▢ 2 tablespoons unsalted butter
• ▢ 1 tablespoon olive oil
• ▢ 1 cup beef broth or vegetable broth
• ▢ 1/2 cup heavy cream or milk for a lighter option
• ▢ 1 cup shredded Gruyère cheese or Swiss cheese
• ▢ Salt and black pepper to taste
• ▢ Fresh chives or parsley chopped (for garnish, optional)

Instructions

• Cook the Potatoes: Place the peeled and cubed potatoes in a large pot and cover with cold water. Add a pinch of salt and bring to a boil. Cook until the potatoes are tender, about 15-20 minutes. Drain and set aside.
• Caramelize the Onions: In a large skillet, heat the butter and olive oil over medium heat. Add the sliced onions and cook, stirring occasionally, until they are caramelized and golden brown, about 15-20 minutes. If the onions start to brown too quickly, reduce the heat.
• Add Broth: Once the onions are caramelized, pour in the beef broth and cook for an additional 2-3 minutes, allowing the broth to reduce slightly.
• Mash the Potatoes: In a large bowl, combine the cooked potatoes and the heavy cream. Mash the potatoes until smooth and creamy. You can use a potato masher or a hand mixer for a creamier texture.
• Combine: Stir the caramelized onions and broth mixture into the mashed potatoes. Add the shredded Gruyère cheese, and mix until the cheese is melted and everything is well combined. Season with salt and black pepper to taste.
• Serve: Transfer the French onion mashed potatoes to a serving dish and garnish with chopped chives or parsley if desired.