Combine sugar and oil. Stir in eggs, one at a time. Stir in molasses. Stir in ginger, cinnamon, and salt. Stir in baking powder. Stir in flour. Roll out 3/4″ balls. Roll balls in extra sugar and place on a greased cookie sheet.
Bake at 350 degrees for 10-12 minutes. Cookies will still be soft. Allow them to rest on warm cookie sheet for two minutes, then transfer to a cooling rack.
To dip cookies, melt squares (about 3 at a time) in a double boiler (a glass bowl set over a saucepan of simmering water). Dip cookies in halfway and shake off excess chocolate. Place on waxed paper. Allow chocolate to set or put pan in refrigerator to set.