Preheat oven to 350° F. Lightly grease a 13 x 9 or 11 x 7 baking pan and line with parchment paper.
In a large bowl, combine the flour, white sugar, brown sugar, cocoa powder, baking soda, salt, ginger, cinnamon, and cloves. Mix these well.
In another bowl, whisk the melted and cooled butter, molasses, and the eggs. Whisk until they are light and frothy.
Add the liquid ingredients to the dry ingredients and mix together. Do not over beat this batter. It will be thick.
Spread the batter into the prepared baking pan and bake for 20 minutes at 350°F.
Let the brownies cool completely before slicing.
If you would like to decorate the brownies then place a mini cookie cutter on a slice of brownie. Dust over the cookie-cutter generously with powdered sugar. Remove the cookie cutter and it will show the shape of the cutter.
Store any leftovers in an airtight container in the refrigerator for up to a week.