Preheat oven to 350°
Spray a 13 x 9" pan with cooking spray.
Whisk flour, baking soda, ginger, cinnamon, cloves and salt. Set aside.
Whisk butter, brown sugar, molasses and egg in a large bowl until smooth.
Stir flour into butter mixture and mix well. Pour into prepared pan.
Sprinkle candied ginger over the top.
Bake in the preheated oven for 25 to 30 minutes until a toothpick comes out clean. Cool on a rack before cutting and serving.