I've sometimes called these potatoes "Holiday mashed potatoes" because, topped with melted butter, they really are next level. Make this delicious recipe any time of the year, but when it comes to the special times - don't forget the extra butter!
Season with the remaining salt, pepper, butter, and ¾ cup of the milk. Using an electric mixer, mix until all of the ingredients are well combined and the potatoes are smooth and creamy. If very stiff/dry, add an additional ¼-½ cup of milk and beat until fluffy.
*Russet potatoes typically need more milk since they are quite a bit more starchy than other varieties.