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4.9 from 27 votes

Horseradish Mashed Potatoes with Caramelized Onions

These horseradish mashed potatoes with caramelized onions are an exciting twist on a traditional dish... full of mouthwatering flavor combinations!

Prep Time
20 mins
Cook Time
20 mins
Total Time
40 mins
Servings: 6 -8
Course: Side Dish , Side Dish , Others
Cuisine: American , Canadian , Vegetarian

Ingredients

  • CARAMELIZED ONIONS:
  • 2 -3 Tbsp butter
  • 2 large yellow onions diced
  • 1/2 tsp dried thyme
  • salt and pepper to taste
  • POTATOES:
  • 3 lbs Yukon gold potatoes
  • 1 tsp salt
  • 1/2 cup + 2 Tbsp heavy cream or half and half
  • 4 Tbsp butter 1/2 stick
  • salt and pepper to taste
  • 1 1/2 Tbsp Dijon mustard
  • 2 Tbsp prepared horseradish more or less to your tastes
  • fresh parsley minced (for garnish)

Instructions

    Cup of Yum
  1. CARAMELIZE THE ONIONS:
  2. Add 2-3 Tbsp butter to a large skillet and heat over MED to MED-HIGH heat. Add diced onions to pan, and saute, stirring often, for 3-5 minutes.
  3. Season with thyme, salt, and pepper.
  4. Reduce heat to MED-LOW and saute, stirring occasionally, for 10-20 minutes, until onions are soft and golden brown in color.
  5. Remove from heat and set aside.
  6. COOK THE POTATOES:
  7. If using baby yukon gold potatoes, halve the smaller ones, and quarter the larger ones.
  8. Add sliced potatoes to a large clean, dry pot. Cover with cold water, about 1" above the potatoes, and season with 1 tsp salt.
  9. Cover, and bring to a boil. Once boiling, remove lid and boil for 15-20 minutes, or until potatoes are tender when pierced with a fork.
  10. Drain potatoes, then return to the same pot.
  11. Microwave heavy cream and butter for 1 minute, then pour over cooked potatoes.
  12. Mash until desired consistency. Alternatively, beat with a hand mixer.
  13. Use a wooden spoon to stir in salt, pepper, dijon mustard, horseradish and caramelized onions.
  14. Garnish with minced parsley.

Notes

  • Recipe adapted from AllRecipes2. I chose to leave the skins on my potatoes, but if you prefer skinless, just peel them first.