01 - Preheat oven to 350°F. Grease and flour a 9-inch square baking pan.
02 - In a medium bowl, whisk together flour, ginger, cinnamon, cloves, nutmeg, baking soda, and salt.
03 - In a large bowl, cream the butter and brown sugar until light and fluffy.
04 - Beat eggs in one at a time, then add molasses and vanilla extract, mixing until combined.
05 - Gradually blend dry ingredients into wet ingredients until just incorporated.
06 - Slowly pour in hot water, mixing until the batter is smooth and thin.
07 - Pour batter into prepared pan and level the surface.
08 - Bake for 35 to 40 minutes or until a toothpick inserted in the center comes out clean.
09 - Allow cake to cool in the pan for 10 minutes; transfer to a wire rack to cool completely.
10 - Serve plain, dusted with powdered sugar, or topped with whipped cream as desired.