1 Preheat oven to 350 degrees F (175 degrees C). Grease and flour a 9 inch round pan. Sift together flour, ginger, cinnamon, baking powder, baking soda and salt. Set aside.
2 In a large bowl, cream butter and brown sugar until light and fluffy. Beat in the egg and molasses. Add flour mixture and water. Beat until smooth.
3 Pour batter into pan. Bake at 350 degrees F (175 degrees C) for 30 to 35 minutes, or until a toothpick inserted into cake comes out clean. Cool in pan on a wire rack for 10 minutes. Remove from pan and serve warm.