Spray a 9-by-13-inch pan with cooking spray and set aside.
Beat the butter, sugar, brown sugar, vanilla, molasses and egg together.
Add in the flour, ginger, cloves, nutmeg, cinnamon, baking soda and salt and beat until the mixture is combined.
Fold in the chocolate chips by hand.
Spread the mixture into the prepared pan. It will be very thick. Sprinkle a few extra chocolate chips on top if you want them to really show up in the final product.
Bake for 20 minutes or until a toothpick inserted in the center comes out clean.
Let the bars cool before cutting them and store in an airtight container.