01 - Preheat oven to 350°F (175°C). Line an 8x8 inch pan with parchment paper for easy removal.
02 - In a medium bowl, whisk together the all-purpose flour, baking soda, fine salt, ground ginger, ground cinnamon, and ground cloves until well combined.
03 - In a separate bowl, stir together the melted unsalted butter, packed brown sugar, molasses, and the large egg until smooth. Gradually fold the wet ingredients into the dry ingredients until just combined. Do not overmix.
04 - Spread the batter evenly into the prepared pan. Bake for 22 to 26 minutes, or until the center is set. Be careful not to overbake to ensure a chewy texture.
05 - Allow the bars to cool completely in the pan. Meanwhile, melt the white chocolate chips (you may add a teaspoon of neutral oil to help with smoothness, if desired). Drizzle the melted white chocolate over the cooled bars. Allow the chocolate to set before slicing.