Grandma's Best Sugar Cookies

2 sticks margarine 2 cups granulated sugar 2 eggs 1 cup canola oil 5 cups all purpose flour ¼ teaspoon salt 2 teaspoons baking soda 2 teaspoons cream of tartar 2 teaspoons vanilla additional sugar for rolling and sprinkling

Cream in large mixing bowl margarine with 2 cups sugar. Add eggs and oil. Set aside. Sift together flour, salt, soda, cream of tartar. Add gradually sifted ingredients to cream mixture. Lastly add vanilla. Chill dough 2 hours or overnight. Form dough into approximately 1½ inch balls a few at a time and roll in extra sugar. Place on cookie sheet 3 inches apart. Bake in preheated oven at 350 degrees for 10-12 minutes. Cookies do not brown. Let cool on sheet 2-5 minutes. Sprinkle each cookie with additional sugar and move to cooling rack.