Sand Sugar Cookies (Sandbakkels)

1 cups Butter
2 cups Sugar
3 Eggs
2 tbsp Sweet milk
1/2 tsp Salt
1 tsp Cream of tartar
1 tsp Baking soda
4 cups Flour
1 tsp Vanilla extract
 
Sift together the salt, cream of tartar, baking soda and flour. Set aside. Cream together butter and sugar. Add the eggs and mix well. Add in milk and vanilla extract. Add in the sifted dry ingredients. Chill in refrigerator for at least 1 hour. Roll dough thinly. Cut into circles or desired shapes. Sprinkle with colored sugar or white sugar. Bake for 10 to 12   minutes at 375 degrees F.