01 - Preheat oven to 350°F. Line two baking sheets with parchment paper.
02 - In a medium bowl, whisk together flour, baking soda, salt, ground ginger, cinnamon, nutmeg, and cloves until evenly blended.
03 - Using an electric mixer or whisk, beat softened unsalted butter with brown sugar and granulated sugar until light and fluffy, about 2 to 3 minutes.
04 - Add egg, vanilla extract, and molasses to the creamed mixture and beat until fully combined.
05 - Gradually add the dry ingredient mixture to the wet ingredients, stirring just until incorporated.
06 - Fold in semisweet chocolate chips and finely chopped crystallized ginger, if using, evenly through the dough.
07 - Drop tablespoon-sized dough balls onto prepared baking sheets, spacing each about 2 inches apart.
08 - Bake in preheated oven for 10 to 12 minutes until the edges are golden and centers are set but still soft.
09 - Allow cookies to cool on baking sheets for 5 minutes before transferring to a wire rack to cool completely.