Worlds Best Sugar Cookie

1 cup
butter

1 cup
powdered sugar

1 cup
white sugar

2 eggs

2 tsp
vanilla

¾ cup
cooking oil

1 tsp
salt

1 tsp
baking soda

5 cups
flour

1 tsp
cream of tarter

Mix and
roll into balls. Flatten with a glass dipped in sugar. Bake at 350 degrees on
an un-greased cookie sheet. Usually baking time is 6-8 minutes. Do not over bake. If you bake for 7-8 minutes I find the edges will get too crisp.Frost as desired.