Peel and cut the potatoes. Place them,along with a sprinkling of salt, into a large saucepan and add enough water to cover the potatoes by 1 inch. Bring the water to a boil over high heat then reduce the heat to medium low and simmer until the potatoes are fork tender, about 15-18 minutes. Drain the potatoes.

Place the butter into the milk and heat in the microwave for 30 seconds. Pour the milk mixture onto the potatoes along with the sour cream; season with sea salt and freshly cracked pepper, to taste. Mash the potatoes using a hand masher until creamy and smooth. Place into a serving bowl and serve immediately. Enjoy.