Prepare Ahead Mashed Potatoes - cooking recipe

Ingredients

potatoes
warm milk
butter
1 egg, separated

Preparation

For \"Mashies\" that stay smooth, mash the potatoes with warm milk, butter and an egg yolk.
Whip an egg white and fold it into the potatoes.
Place in a buttered casserole and dot with more butter.
Cover and refrigerate until ready to use.