In a large mixing bowl use a hand held mixer to beat together butter, brown sugar, molasses and egg until combined. Batter will be a little lumpy.
Mix in flour, baking soda, cinnamon, ginger, cloves and salt. Continue mixing until well combined.
Spread batter into a 10 inch cast iron skillet. Sprinkle with about 2 tablespoons of granulated sugar. Bake in preheated oven for 30 - 40 minutes or until center is set and a toothpick inserted comes out with a few crumbs on it.
Sprinkle with remaining sugar. Cool slightly, slice and serve warm.