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Horseradish Mashed Potatoes with Caramelized Onions | Not your average side dish, these mashed potatoes are full of amazing flavor combinations. Perfect for your holiday table! | http://thechunkychef.com
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5 from 2 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 Time20 mins
Cook Time20 mins
Total Time40 mins
Servings: 6 -8 servings
Author: The Chunky Chef


  • 2 -3 Tbsp butter
  • 2 large yellow onions diced
  • 1/2 tsp dried thyme
  • salt and pepper to taste
  • 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)


  • 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.
  • Season with thyme, salt, and pepper.
  • Reduce heat to MED-LOW and saute, stirring occasionally, for 10-20 minutes, until onions are soft and golden brown in color.
  • Remove from heat and set aside.
  • If using baby yukon gold potatoes, halve the smaller ones, and quarter the larger ones.
  • Add sliced potatoes to a large clean, dry pot. Cover with cold water, about 1" above the potatoes, and season with 1 tsp salt.
  • 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.
  • Drain potatoes, then return to the same pot.
  • Microwave heavy cream and butter for 1 minute, then pour over cooked potatoes.
  • Mash until desired consistency. Alternatively, beat with a hand mixer.
  • Use a wooden spoon to stir in salt, pepper, dijon mustard, horseradish and caramelized onions.
  • Garnish with minced parsley.


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