Preheat oven to 350°F.
Heat butter in a small saucepan over low-medium, stirring until foamy. Continue stirring until browning, approximately 4 minutes. If you need to increase the heat, do so while continually stirring to prevent scorching.
Transfer butter to a mixing bowl and add sugars plus 2 Tablespoons water. Mix or whisk until the sugars are totally dissolved -- this may take 2 minutes or so.
Add egg and vanilla extract and mix. Add dry ingredients (gfJules Flour, cocoa, salt, baking powder, baking soda, spices) and mix until dough forms.
Line cookie sheet with parchment and scoop dough balls with cookie scoop or spoon, transferring dough balls to your hands to roll between your palms to compress the dough further. Leave about 2 inches between dough balls. Press down gently on the balls before baking to flatten slightly.
Bake until puffy, about 8 minutes. Remove to a wire rack for 1-2 minutes.
Meanwhile, prepare the chocolate bar by breaking or cutting into irregular shapes and pieces and dice the ginger finely.
Press chocolate into the center of each cookie and sprinkle tops with candied ginger. Return the cookie sheet to the oven for 30 seconds or up to 1 minute -- until the chocolate is looking melty on top. Remove to finish cooling, sliding the parchment onto the wire rack to remove from the hot tray in order to stop the cookies from continuing to bake further.
Once cooled, serve or store at room temperature in an airtight container.