Grandma's Sugar Cookies

These are the cookies I always remember in my Grandma's cookie jar. They bring back so many memories of Grandma's house :)

1 cup butter or margarine
1 cup shortening
1 cup sugar
1 cup powdered sugar
1 egg
2 tsp cream of tartar
2 tsp baking soda
1 ¼ tsp salt
1 ½ tsp vanilla
4 cups flour

Mix all together and put in fridge to chill for 1-2 hours. Roll into balls and dip in sugar (or cinnamon and sugar), place on cookie sheet and flatten with a fork. Bake at 350 degrees for 15 minutes.