01 - In a large bowl, cream together softened butter and packed brown sugar until light and fluffy.
02 - Add the egg and molasses to the creamed mixture and mix until fully incorporated.
03 - In a separate bowl, whisk together all-purpose flour, ground ginger, cinnamon, cloves, nutmeg, baking soda, and salt.
04 - Gradually add the dry mixture to the wet mixture, stirring until a uniform dough forms.
05 - Divide the dough in half, shape each into a disc, wrap in plastic, and refrigerate for at least one hour.
06 - Preheat oven to 350°F. Line baking sheets with parchment paper.
07 - On a lightly floured surface, roll dough to 1/4-inch thickness and cut into desired shapes with cookie cutters.
08 - Place cut shapes on baking sheets spaced 1 inch apart.
09 - Bake cookies for 8 to 10 minutes until edges become firm. Let cool on sheets for 5 minutes, then transfer to a wire rack to cool completely.
10 - Whisk powdered sugar, vanilla extract, and 2 tablespoons milk until smooth; add additional milk to reach desired consistency.
11 - Divide the icing, color as desired, then pipe or spread onto cooled cookies. Allow icing to set before serving or storing.