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Best Ever Caramelized Onion Mashed Potatoes Recipe


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4.2 from 11 reviews

  • Author: Eve
  • Total Time: 1 hour 30 minutes
  • Yield: 8 servings
  • Diet: Vegetarian

Description

These Best Ever Caramelized Onion Mashed Potatoes feature creamy Yukon Gold potatoes mixed with richly caramelized onions, fresh herbs, and Parmesan cheese for a comforting and flavorful side dish perfect for any occasion.


Ingredients

For the Caramelized Onions

  • 2 Tablespoons Olive Oil
  • 4 Yellow Onions, thinly sliced
  • 2 Sprigs Fresh Thyme, stems removed
  • 3 Leaves Fresh Sage, chopped

For the Mashed Potatoes

  • 2 Pounds Yukon Gold Potatoes, washed and chopped (skin on or peeled as preferred)
  • 4 Tablespoons Salted Butter (or non-dairy butter)
  • 3/4 Cup Half & Half or Full-Fat Coconut Milk or Dairy-Free Milk
  • 1 Teaspoon Kosher Salt
  • 1 Cup Parmesan Cheese, freshly grated
  • 1 Bunch Chives, thinly chopped


Instructions

  1. Prepare Onions: Peel and thinly slice the yellow onions evenly. Set aside to use for caramelizing.
  2. Heat Skillet: Place a skillet over medium heat on the stove and add the olive oil. Wait until the oil is hot before adding onions.
  3. Caramelize Onions: Add the sliced onions to the hot oil and stir occasionally. Cook for approximately 40-50 minutes until the onions are deeply browned, caramelized, and shrunken.
  4. Prepare Potatoes: While onions cook, wash and chop the Yukon Gold potatoes into small pieces. You may keep the skin on for added texture and fiber.
  5. Boil Potatoes: Bring a pot of water to a rolling boil on the stove. Add the chopped potatoes and cook for about 20 minutes until fork tender.
  6. Drain Potatoes: Carefully drain the water from the boiled potatoes.
  7. Mash Potatoes: Mash the drained potatoes with butter, kosher salt, and your choice of half & half, full-fat coconut milk, or dairy-free milk until smooth and fully combined.
  8. Add Onions and Cheese: Remove caramelized onions from heat and fold half of them into the mashed potatoes along with the freshly grated Parmesan cheese.
  9. Stir Ingredients: Mix thoroughly ensuring the onions and cheese are evenly distributed throughout the potatoes.
  10. Garnish and Serve: Transfer mashed potatoes to a serving bowl and top with the remaining caramelized onions, chopped chives, thyme, sage, and a drizzle of melted butter. Serve warm and enjoy!

Notes

  • For a dairy-free option, substitute butter with non-dairy butter and half & half with full-fat coconut milk or preferred dairy-free milk.
  • Leaving potato skins on adds texture and increases fiber content.
  • Caramelizing onions takes time but adds deep flavor, so patience is key.
  • Fresh herbs like thyme, sage, and chives elevate the dish with vibrant aromatic notes.
  • Use Yukon Gold potatoes for creamy texture and natural sweetness.
  • Prep Time: 15 minutes
  • Cook Time: 1 hour 15 minutes
  • Category: Side Dish
  • Method: Stovetop
  • Cuisine: American