Place the sugar, molasses and butter in a saucepan, boil 5 minutes.
When slightly cool but still warm, add 1 Tbs. white vinegar. Stir in.
Into a bowl sift flour, salt, baking soda and ground ginger.
While still warm, pour saucepan mixture into a bowl of flour mixture.
Stir well and if needed add more flour until consistency is no longer sticky.
Roll dough into portions that are easy to handle (I usually get 5 or 6 rolls from one batch).
Wrap each roll into saran wrap and refrigerate several hours or overnight.
When chilled, roll the dough into logs and slice about ¼ inch thick.
Place rings on cookie sheet and bake at 350 degrees for 7-8 minutes.
Very important! Remove cookies from sheet as soon as you take them from the oven. If the cookies cook, even slightly, when on the sheet you can’t get them off.