First, wash the potatoes. Then peel them and cut them into evenly-sized chunks. Put them in a large pot.Add water and some salt to the pot. The water should be about 2 inches above the potatoes.
Set the heat to high and bring to a boil.Once it boils, lower the temperature to medium or medium-low and let it simmer until tender.
While the potatoes are boiling, prepare the milk mixture. In a smaller saucepan on medium-low heat, add the milk, butter, salt and pepper. Cook until the milk warms up and the butter melts.
Check the potatoes. The potatoes are done when you poke it with a fork and it pierces through without resistance.Drain the potatoes and return to the pot on low heat.
Add the mixture and sour cream to the potatoes and mash gently with a potato masher to incorporate. *Be sure not to overly mash as this will result in gummy or sticky potatoes! (Refer to the notes for further info).
Taste and adjust for salt or pepper, if necessary. Top with chives if desired and serve.
Enjoy!
Notes
If you are worried about over mashing or you want a super smooth consistency with absolutely no chunks, you can use a potato ricer instead of a masher.
If you decide to use a potato ricer, run the potatoes through the ricer first, then stir in the milk mixture and sour cream.
If you want creamier mashed potatoes, stir in another 1/2 cup of sour cream.