Cream butters and sugars together, Mix in egg and vanilla, beat well. Add flour, soda, and salt. Mix well. Form into small balls. Roll balls in white sugar. Bake 8 minutes at 350. Top with star, bake 2-5 minutes longer.
for entire amount (10-13 minutes) or put stars on after baking full amount. Saves a step and they turn out fine. I also don't dip my cookies in sugar before baking. We like them better not quite so sugary.