Mix together sugar, powdered sugar, butter, oil and eggs.
In a smaller bowl mix vanilla, salt, cream of tartar, baking soda, flour and mix well.
Blend all ingredients and chill for an hour or overnight even.
Flour hands and shape dough into balls and place on cookie sheet.
Flatten balls with chilled glass dipped in sugar. Sprinkle with colored sugar and bake at 350 degrees until edges are golden.