Horseradish Mashed Potatoes Recipe (2024)

Published on Dec 8, 2021 Modified: Aug 7, 2020 by Alexandria Drzazgowski. This post may contain affiliate links which won’t change your price but will share some commission.

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These horseradish mashed potatoes are filled with chives, sour cream, milk, and horseradish. They are perfect as a side to red meat, including steak or prime rib.

Why Make this Recipe

Great with Red Meat: I LOVE eating these Horseradish Mashed Potatoes with red meat, especially steaks or prime rib.
Something Unique: It’s fun to experiment with new ways of cooking old favorites. Change up your typical mashed potatoes recipe by adding a fun new ingredient.
Great for Leftovers: This recipe is great for enjoying as leftovers or for prepping a day ahead of time.

What Do I Need to Make this Recipe?

Here is a visual overview of the ingredients in the recipe. Scroll down to the recipe at the bottom for quantities.

Potatoes: I use Russet or Idaho potatoes
Sour Cream: You can use light or normal sour cream, but the potatoes will have a better texture with normal sour cream
Green Onions: They are also called scallions. These are optional, but delicious.
Horseradish: You can buy horseradish fresh, but I normally buy it in the jar.

For full ingredient measurements, visit the recipe card at the bottom of the page.

Best Potatoes for Mashing

You’ll want to choose potatoes that are high in starch. I used russet potatoes, but Idaho and Yukon Gold are good options as well.

Try to steer clear of red skinned potatoes and similar varieties, as they will take longer to break down and will more likely result in gluey potatoes.

How to Make this Recipe

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Step 1: Cook the Potatoes

Fill a large pot with water and bring it to a boil. Add the potatoes and boil until tender, about 10-12 minutes. You should be able to pierce them easily with a fork.

Drain the potatoes and then place them back into the pot.

Step 2: Mash the Potatoes

Add the melted butter and milk and mash with a potato masher until smooth and creamy, adding more milk if necessary.

Step 3: Season

Add the rest of the ingredients into the mashed potatoes, and use a spoon to mix until well combined, adding more horseradish if you like a stronger flavor.Not sure you will enjoy horseradish again? Try Colcannon, an Irish way of enjoying mashed potatoes that instead rely on kale and scallions in addition to the heavy cream and garlic. So many ways to enjoy potatoes!

Enjoy! Leave a comment on this recipe letting me know what you thought.

Tips on Mashing Potatoes

Whatever you do, avoid a food processor or a handheld mixer. When you boil potatoes, the starch in them becomes very delicate. This is amplified when you begin mashing or mixing your potatoes.

Over-mixing your potatoes will result in more starch being released, which in turn makes for potato paste instead of mashed potatoes. The texture turns out almost like a glue instead of the fluffy potatoes that you want.

Expert Tips

You can also use an Instant Pot to cook your potatoes. See the instructions in the recipe card for guidance.
This recipe was made using an 8 qt Instant Pot, but measurements will work the same in a 6 qt.
You can use a potato ricer if you so choose, or just use a potato masher
To store, put in an airtight container in the fridge for up to 5 days.

Recipe FAQs

What is Horseradish?

Horseradish is a root that comes from the same family as broccoli and wasabi. Sometimes the leaves of horseradish are cooked, but, most commonly, horseradish is harvested for its roots.

When first pulled from the ground, horseradish appears harmless. However, when the root is cut or scraped, two components in the horseradish– sinigrin and myrosin– combine to make a nostril clearing scent.

The aroma that comes from the horseradish is cause for its polarizing tendency. The root is spicy, but without a lingering pain, a phenomenon that is addicting for many people! You can eat horseradish and feel the pungency of the flavor, and in a few moments forget it happened at all. This is probably why people chase the taste!