Cream the butter and the sugar
Add the well beaten eggs and mix well
Sift the flour, and add the salt, baking soda, and cream of tarter.
Mix thoroughly, and add vanilla.
Roll dough in thin sheet 1/8th of an inch thick and Cut with a floured cookie cutter and place on a slightly greased baking sheet
Bake in hot oven (400 degrees) for about 10 minutes
If you bake the cookies longer than 10 minutes..they will be crisper. I like a soft cookie so I bake mine like Grandma did....about 10 minutes so the cookies are light colored but have a slightly brown edge.