Grease a 9 inch round or square pan (go ahead and use a smaller one if needed, just increase your time by about 10 minutes).
Mix flour, cinnamon, ginger, baking powder, salt, & baking soda together. Set aside.
Beat brown sugar, shortening & molasses until fluffy (about 45 seconds give or take).
Add egg & vanilla and beat for 1 minute.
Add ½ of the flour mixture and beat until combined.
Add ½ cup water and beat until combined.
Add remaining flour mixture and beat just until combined.
Pour into pan and bake in 350 degree oven for 30-40 minutes (use the toothpick method to check!)