Slice potatoes, removing any brown spots while doing so.
Place potatoes in a large pot and fill up with enough water to just cover the potatoes. Season water with salt. Bring water to a boil. Once water is boiling, reduce to a simmer and cover. Cook for 15 minutes.
Drain potatoes and return them to empty pot. Add butter, milk, salt and pepper then begin to mash. Serve warm and enjoy!