Heat oven to 300ºF.
Submerge washed potatoes in a pot of cold water and 1 teaspoon of Momofuku Savory Seasoned Salt. Fill the water just 1 inch above the level of the potatoes in the pot. Bring the water to a light simmer. Cook potatoes until tender. Drain potatoes, place onto a cooking tray in the oven to dry out the potatoes lightly—approximately 5 minutes.
Meanwhile, steep milk, the crushed clove of garlic, and the bay leaf over low heat. Add 1 teaspoon of Momofuku Savory Seasoned Salt to the mixture.
After the potatoes are dried, pass them through a ricer and into a clean pot. Discard the potato skin in between ricing each potato. Mash the potatoes with a rubber spatula as you mix in the cubed butter. Remove the garlic and bay leaf from the milk and add small amounts of the milk into the mash, alternating with butter, to desired consistency. If you prefer a smoother mash, pass it through a fine sieve.
Finish with the remaining 1 teaspoon of Momofuku Savory Seasoned Salt. Keep warm until ready to serve.
