Step-by-Step Instructions

1. 1.Prepare potatoes for boiling

   Add 1 tablespoon of coarse sea salt to a large pot. Add 8 peeled potatoes, cut into 1.5-inch cubes. Add cold water to cover the potatoes.

2. 2.Boil potatoes

   Cover the pot and bring to a boil. Once boiling, put the lid ajar to prevent overflow. Boil for 15 minutes or until tender.

3. 3.Check for tenderness

   The best way to check if they're done is to insert a fork or a knife into the center; if it goes in with no resistance, then they're ready.

4. 4.Drain and mash potatoes

   Drain the potatoes well and return them to the pot. Mash the potatoes until mostly smooth.

5. 5.Add butter

   Add 1/2 cup (113g) of butter to the mashed potatoes and mash again until combined and melted.

6. 6.Add sour cream and milk

   Add 1/2 cup (120g) of sour cream and 1/2 cup (120ml) of warm milk to the potatoes. Mash until nicely incorporated and creamy.

7. 7.Add horseradish

   Add 1/4 cup (60g) of creamy horseradish to the potatoes and mash to blend thoroughly.

8. 8.Season

   Season with 1 teaspoon of garlic salt, 1/2 teaspoon of freshly ground mixed peppercorns, and 2 tablespoons of fresh chopped chives.

9. 9.Final mix and taste

   Mix one more time, making sure there are no lumps. Taste and adjust seasoning if needed before serving.