Preheat oven to 350℉ and grease and flour a 9" x 13" baking pan.
In a large bowl Mix together flour, sugar, and butter until clumps form.
Set aside one cup of the clumps for the topping
Incorporate one egg and baking soda into the mixture
Wisk water and molasses into the mixture until mixed batter is formed
Pour batter into floured cake pan and then spread the topping around the top of the batter
Bake at 350℉ for 45 minutes or until a toothpick comes out clean.