I found a variation of this recipe in a Deanna House cookbook years ago, where it's called "Make Ahead Mashed Potatoes".
This is my family's favorite mashed potato recipe (and several of them don't like sour cream). It's also an easy, delicious side dish to prepare a day ahead of time.
I like to mix potato varieties- red and yellow works well. I also leave the skins on (for extra nutrients), but you can peel the potatoes prior to boiling them, for a creamier end result.
This recipe is very easy to double for larger crowds.