Mom's Amazing Mashed Potatoes

Peel 4 potatoes
Slice thin. Boil with a little salt, for 20 minutes (or tender).
Drain water.

In the microwave melt 1/4 stick butter and 1/4 cup milk (until butter is melted).

Beat potatoes in mixer on medium until smooth. Stir once, make sure there are no lumps. Add liquid a little at a time. Whip on high about 45 seconds, until light and fluffy.