Preheat the oven to 350F. Grease and flour a 9x13-inch baking pan or use baking spray.
In a large bowl, whisk together the flour, baking powder, ginger, cinnamon, salt, cloves, and baking soda.
In a separate bowl, combine the molasses and hot water until fully mixed. Add the sugar and melted butter, whisking until well combined. Incorporate the eggs and vanilla extract.
Gradually mix the wet ingredients into the dry ingredients until the batter is smooth. Pour the batter into the prepared baking pan.
Bake for 30 to 35 minutes, or until a toothpick inserted into the center comes out clean. Allow the cake to cool in the pan on a wire rack before serving.