French Onion Mashed Potatoes Recipe

Elevate your classic mashed potatoes with the rich, savory flavors of caramelized onions and creamy indulgence. French Onion Mashed Potatoes combine the comforting appeal of mashed potatoes with the golden sweetness of caramelized onions and the subtle tang of sour cream. Whether you’re preparing a holiday feast or a cozy family dinner, this dish is sure to impress.

What Are French Onion Mashed Potatoes?

French Onion Mashed Potatoes are a decadent twist on traditional mashed potatoes. The recipe blends buttery Yukon Gold potatoes with golden caramelized onions, heavy cream, and optional shredded Gruyère cheese for a luxurious side dish. It’s a perfect pairing for roasted meats or as a comforting standalone dish.

Why You’ll Love This Recipe

  • Rich and flavorful: The caramelized onions add a deep, sweet-savory flavor.
  • Creamy texture: The combination of heavy cream and sour cream ensures ultra-smooth potatoes.
  • Versatile: Pair with any main course or enjoy on their own.
  • Customizable: Easily adapt the recipe with your favorite cheese or dietary preferences.

Ingredients

  • 3 lbs (1.4 kg) Yukon Gold potatoes, peeled and cubed
  • 3 tbsp (42 g) unsalted butter
  • 2 large onions, thinly sliced
  • ½ tsp sugar
  • 1 cup (240 ml) heavy cream, warmed
  • ½ cup (120 g) sour cream
  • 1 tsp garlic powder
  • 1 cup (120 g) shredded Gruyère or Swiss cheese (optional)
  • Salt and pepper to taste

Step-by-Step Instructions

Preparing the Caramelized Onions

  1. In a skillet, melt the butter over medium heat.
  2. Add the sliced onions and sprinkle with sugar. Stir well.
  3. Cook slowly, stirring occasionally, until the onions are golden and caramelized, about 20-25 minutes.
  4. Remove from heat and set aside.

Cooking and Mashing the Potatoes

  1. In a large pot, boil the peeled and cubed potatoes in salted water for 15-20 minutes or until fork-tender.
  2. Drain the potatoes thoroughly and return them to the pot.

Combining the Ingredients

  1. Mash the potatoes using a potato masher or ricer until smooth.
  2. Stir in the warmed heavy cream, sour cream, garlic powder, salt, and pepper. Mix well to combine.
  3. Gently fold in the caramelized onions and shredded cheese (if using). Stir until the cheese is melted and the onions are evenly distributed.

Serving Suggestions

  • Garnish with extra caramelized onions or fresh parsley for a vibrant finish.
  • Pair with roasted chicken, beef, or pork for a hearty meal.
  • Serve alongside sautéed vegetables or a crisp green salad.

Storing and Freezing

Storage Tips

  • Store leftovers in an airtight container in the refrigerator for up to 3 days.
  • Reheat gently on the stovetop or in the microwave, adding a splash of cream if needed to restore creaminess.

Freezing Instructions

  • Freeze in individual portions in airtight containers for up to 1 month.
  • Thaw in the refrigerator overnight before reheating.

Recipe Variations

  • Cheese-free: Skip the cheese for a lighter option.
  • Make it vegan: Replace butter with plant-based butter, use dairy-free cream alternatives, and skip the cheese.
  • Herb-infused: Add fresh rosemary or thyme for an aromatic twist.
  • Spicy kick: Stir in a pinch of cayenne pepper or red chili flakes.

FAQs

Can I use a different type of potato?
Yes, russet potatoes can also be used, but Yukon Gold potatoes offer a naturally buttery texture.

What’s the best way to caramelize onions?
Low and slow is the key. Stir occasionally to avoid burning and allow the onions to release their natural sugars.

Can I make this dish ahead of time?
Absolutely! Prepare the mashed potatoes up to 24 hours in advance. Store them in the fridge and reheat gently before serving.

French Onion Mashed Potatoes are a crowd-pleasing side dish packed with layers of flavor and creamy goodness. This recipe is easy to prepare and offers plenty of customization options to suit your taste. Try it for your next dinner or holiday gathering—you won’t be disappointed!

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French Onion Mashed Potatoes Recipe


  • Author: Julia Childley
  • Total Time: 50 minutes
  • Yield: 6 servings

Description

French Onion Mashed Potatoes are a creamy, flavorful side dish that combines buttery Yukon Gold potatoes with caramelized onions, heavy cream, and optional Gruyère cheese. Perfect for holidays or cozy dinners, this indulgent recipe is sure to delight!


Ingredients

  • 3 lbs (1.4 kg) Yukon Gold potatoes, peeled and cubed
  • 3 tbsp (42 g) unsalted butter
  • 2 large onions, thinly sliced
  • ½ tsp sugar
  • 1 cup (240 ml) heavy cream, warmed
  • ½ cup (120 g) sour cream
  • 1 tsp garlic powder
  • 1 cup (120 g) shredded Gruyère or Swiss cheese (optional)
  • Salt and pepper to taste

Instructions

Step 1: Caramelize the Onions

  1. Heat butter in a skillet over medium heat.
  2. Add sliced onions and sprinkle with sugar. Cook, stirring occasionally, for 20-25 minutes until the onions are golden and caramelized. Set aside.

Step 2: Prepare the Potatoes

  1. In a large pot, boil cubed potatoes in salted water for 15-20 minutes or until fork-tender.
  2. Drain the potatoes thoroughly and return them to the pot.

Step 3: Mash and Combine

  1. Mash the potatoes until smooth.
  2. Stir in heavy cream, sour cream, garlic powder, salt, and pepper. Mix well.
  3. Gently fold in caramelized onions and cheese (if using) until evenly combined and creamy.

Step 4: Serve

Serve warm, garnished with additional caramelized onions or fresh parsley.

Notes

  • Make Ahead: You can prepare the mashed potatoes a day in advance and reheat gently before serving.
  • Cheese Substitute: Use shredded cheddar or Parmesan for a different flavor profile.
  • Vegan Option: Replace butter and cream with plant-based alternatives and omit the cheese.
  • Texture Tip: For ultra-smooth mashed potatoes, use a potato ricer or food mill instead of a masher.
  • Prep Time: 25 minutes
  • Cook Time: 25 minutes
  • Category: Side Dish
  • Method: Boiling, Mashing
  • Cuisine: American, French-inspired

Nutrition

  • Serving Size: About 1 cup
  • Calories: 320 (per serving, approximate)
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