for the bars:
1/2 cup butter, softened
1/2 cup granulated sugar
1/2 cup packed brown sugar
1 egg
3/4 teaspoon vanilla extract
1/4 cup molasses
1/2 teaspoon cinnamon
1/8 teaspoon cloves
1/8 teaspoon nutmeg
1/2 teaspoon ground ginger
1/2 teaspoon salt
2 cups all purpose flour
1 teaspoon baking soda

for the frosting-
4 oz. cream cheese, softened
1/4 cup butter, softened
1 cup powdered sugar
1/2 teaspoon vanilla