Lois's Amish Sugar Cookies
1 cup unsalted butter, softened, no substitutions
1 cup vegetable oil
1 cup sugar
1 cup confectioners sugar
2 eggs
1 teaspoon vanilla
4 1/2 cups flour
1 teaspoon baking soda
1 teaspoon cream of tartar

Cream butter, oil, sugar and confectioners sugar together.  Add eggs, beat one minute.  Add vanilla.  Mix flour, baking soda, and cream of tartar.  Mix into butter mixture.  Drop small teaspoons onto cookie sheet or roll into balls and press gently.  Bake 9 to 10 minutes at 375f.  Watch cookies closely because they will brown quickly.