Cake
Preheat oven to 325 degrees.
Add the sugar, molasses, hot water, egg, and butter to a bowl. Mix well.
Next, add all-purpose flour, baking soda, and salt to the wet ingredients and mix well.
Add the ginger, cinnamon, and nutmeg and mix.
Pour batter into an 8" x 8" greased and floured cake pan.
Bake in the preheated oven for 50 minutes or until cake tester comes out clean.
Frosting
Cream the butter and cream cheese together in a medium-sized bowl.
Add the powdered sugar and milk and mix until well blended.
Next, add the molasses and mix until well blended.
Spread on top of the cake.