In a large bowl, cream butter and sugar until light and fluffy. Beat in egg. Combine the flour, ginger, baking soda, cinnamon, salt and salt; gradually add to the creamed mixture and mix well
Roll into 1 1 /2 inch balls, Then roll in sugar. Place 2 inches apart on parchment lined baking sheets. Bake at 350°F for 10 to 12 minutes or until puffy and lightly browned. Remove to wire racks to cool.
Filling: place all ingredients in a medium size bowl and beat with a wooden spoon until smooth. Add more milk as needed. Frost cookies (once cooled off,) and enjoy!🙂