Preheat the oven to 350 degrees. Spray an 8 x 8 pan with baking spray and set aside.

In a medium bowl combine the all purpose flour and whole wheat flour, cinnamon, baking soda, and salt.  Stir until well combined.

In a large bowl combine the milk, molasses, melted butter, coffee, sugar, ginger, and egg. Whisk until smooth.

Pour the flour mixture into the milk mixture and whisk until just blended.

Pour into the prepared bake and bake for 25 minutes-30 minutes or until a toothpick inserted into the center comes out clean.

Cool for at least an hour.

Once the cake has cooled sprinkle it with powdered sugar and cut it into 12 squares.