Best Ever Caramelized Onion Mashed Potatoes

Name: Best Ever Caramelized Onion Mashed Potatoes
Prep time: 20 min
Cook time: 40 min
Total time: 1 h
Yield: 4 servings
Ingredients: 2 pounds russet potatoes, peeled and cubed; 4 tablespoons unsalted butter; 1/2 cup heavy cream; Salt and pepper to taste; 2 large onions, thinly sliced; 2 tablespoons olive oil; 1 teaspoon sugar; Salt to taste

Highlighted under: Comfort Food

Discover the ultimate comfort food with our Best Ever Caramelized Onion Mashed Potatoes. Creamy, buttery, and bursting with sweet caramelized onions, this dish elevates traditional mashed potatoes to a whole new level.

Created by

Imogen Price

Last updated on 2025-12-11T12:42:46.511Z

These mashed potatoes are not just a side dish; they are an experience. The sweetness of the caramelized onions perfectly balances the creaminess of the potatoes, making this recipe a favorite for family gatherings and holiday feasts.

        Why You'll Love This Recipe
        Rich, sweet flavor from the caramelized onions
Ultra-creamy texture that pairs perfectly with any meal
Easy to prepare, yet impressive enough for special occasions

      

Perfect for Any Occasion

These Best Ever Caramelized Onion Mashed Potatoes are not just a side dish; they're a star on their own. Whether you're serving them at a holiday dinner, a family gathering, or even a casual weeknight meal, they impress every time. The rich flavor of the caramelized onions combined with the creamy texture of the potatoes makes them a versatile accompaniment to a variety of main courses, from roasted meats to vegetarian dishes.

What's more, you can prepare them in advance, allowing you to spend more time with your guests. Simply make the mashed potatoes ahead of time and reheat them before serving. This makes them an ideal choice for busy hosts who want to enjoy a delicious meal without the last-minute rush.

A Twist on a Classic

Mashed potatoes are a beloved classic, but adding caramelized onions takes this comfort food to new heights. The sweetness of the onions balances the buttery richness of the potatoes, creating a dish that’s both savory and slightly sweet. This unexpected twist not only enhances the flavor but also adds a gourmet touch that will have your guests asking for the recipe.

Experimenting with different types of onions can also yield delightful variations. For instance, using sweet Vidalia onions can amplify the sweetness, while red onions offer a more robust flavor. Feel free to adapt the recipe to suit your taste preferences and enjoy the journey of discovery in your cooking.

Cooking Tips for Success

To achieve the perfect caramelized onions, patience is key. Cooking them slowly over medium heat allows the natural sugars to break down and develop that rich golden color. Stir occasionally to prevent burning, and be sure to scrape the bottom of the pan to release any flavorful bits stuck on the surface. If your onions start to brown too quickly, reduce the heat to ensure they caramelize evenly.

When mashing the potatoes, using a potato ricer can lead to the ultimate creamy texture. This tool ensures that there are no lumps, giving you a smooth and velvety result. Additionally, warming the butter and cream before adding them to the potatoes can help create an even creamier consistency, making every bite indulgently rich.

Ingredients

For the Mashed Potatoes

2 pounds russet potatoes, peeled and cubed
4 tablespoons unsalted butter
1/2 cup heavy cream
Salt and pepper to taste

For the Caramelized Onions

2 large onions, thinly sliced
2 tablespoons olive oil
1 teaspoon sugar
Salt to taste

Mix the ingredients thoroughly for the best taste.

Instructions

Caramelize the Onions

In a large skillet, heat olive oil over medium heat. Add the sliced onions and sprinkle with sugar and salt. Cook, stirring occasionally, until the onions are golden brown and caramelized, about 25-30 minutes.

Boil the Potatoes

While the onions are cooking, bring a large pot of salted water to a boil. Add the cubed potatoes and cook until fork-tender, about 15-20 minutes. Drain well.

Mash the Potatoes

In the same pot, add the boiled potatoes, butter, and heavy cream. Mash until creamy and smooth. Season with salt and pepper to taste.

Combine and Serve

Fold the caramelized onions into the mashed potatoes and mix well. Serve warm and enjoy your deliciously rich mashed potatoes!

Serve hot as a perfect side to your favorite dishes.

Pro Tips

For an extra flavor boost, add some grated Parmesan cheese or fresh herbs to the mashed potatoes before serving.

Storage and Reheating

Leftover caramelized onion mashed potatoes can be stored in an airtight container in the refrigerator for up to three days. To reheat, place them in a saucepan over low heat, adding a splash of milk or cream to restore their creamy texture. Stir frequently to prevent sticking and ensure even heating.

If you wish to freeze the mashed potatoes, do so before adding the caramelized onions. Place them in a freezer-safe container, and they can last up to three months. When ready to enjoy, thaw in the refrigerator overnight, then add the caramelized onions and reheat as mentioned.

Pairing Suggestions

These mashed potatoes pair beautifully with a variety of main dishes. For a classic combination, serve them alongside a juicy roast chicken or turkey. The richness of the potatoes complements the savory flavors of the meat, creating a harmonious meal that everyone will love.

Vegetarians can enjoy these mashed potatoes with a hearty lentil stew or a mushroom risotto. The sweetness from the caramelized onions adds depth to the dish, making it satisfying and flavorful. Additionally, they can be topped with a sprinkle of fresh herbs or cheese for an extra burst of flavor.

Questions About Recipes

→ Can I make these mashed potatoes ahead of time?

Yes, you can prepare the mashed potatoes and store them in the refrigerator. Reheat them gently before serving.

→ What type of potatoes are best for mashing?

Russet potatoes are ideal for mashing due to their starchy texture, resulting in creamy potatoes.

→ Can I freeze caramelized onion mashed potatoes?

Yes, you can freeze them. Just make sure to store them in an airtight container. Thaw and reheat before serving.

→ How do I make these mashed potatoes vegan?

Substitute butter with vegan butter and heavy cream with coconut milk or any plant-based milk.