01 - In a large bowl, cream together the softened butter and brown sugar until the mixture is light and fluffy. Beat in the egg and molasses until fully incorporated.
02 - In a separate bowl, whisk together the all-purpose flour, baking soda, salt, ground ginger, cinnamon, cloves, and nutmeg.
03 - Gradually add the dry ingredients to the wet mixture, stirring until a uniform dough forms.
04 - Divide the dough into two equal portions, shape into discs, wrap in plastic wrap, and refrigerate for at least 45 minutes to firm.
05 - Preheat the oven to 350°F. Line baking sheets with parchment paper. Roll the chilled dough on a lightly floured surface to 1/4-inch thickness and cut shapes with a cookie cutter. Place cookies 1 inch apart on prepared sheets and bake for 10 to 12 minutes until edges are set. Cool completely on wire racks.
06 - Beat the egg white (or meringue powder mixture) until frothy. Gradually add sifted powdered sugar and vanilla extract, beating until smooth and glossy. Divide and tint with desired food coloring.
07 - Transfer icing to piping bags and decorate cooled cookies with icing and assorted decorations. Allow icing to set fully before serving or packaging.