I always use 5 large baked potatoes for just me and my husband. (so i can have a little extra for lunch the next)
Peel Potatoes & cut into chucks
Put water in a large pot--Bring to boil
Put peeed potatoes in boiling water.
Watch potatoes and check them to see when they are tender.
Drain water off of potatoes, Pour back into pot or bowl.
Use Potato masher to mash up potatoes.
Pour Milk and spoons of butter to your taste. (i usually put 2 tablespoons of butter and i just pour milk until they look good) Stir until they are as fluffy as you want them!! Serve Hot!!
Salt & Pepper to taste