Melt butter and mix in brown sugar. Let mixture cool, and then add egg. Add soda, molasses, salt and ginger. Stir it thoroughly. Add flour and mix in. Chill the dough for 4 hours or even overnight.

Preheat oven to 375 degrees.

Roll dough into walnut sized balls with your hands and roll them in sugar. 

Place on greased cookie sheet.

(original recipe says to flatten with a spatula, I did not. mine were more puffy)

Bake for 10 minutes or until nicely browned.

Cool on cookie sheets for no longer than one minute, or they will stick.