Combine 2 1/4 cups flour, 2 tsp. baking soda, 1 tsp. cinnamon, 1/4 tsp. ground cloves, and 1/2 tsp. each of ground ginger, allspice and salt in a bowl and mix well.
Beat 3/4 cups unsalted butter and 3/4 cups packed dark brown sugar in bowl of electric mixer until light and fluffy, about 3 minutes.
Add one large egg and 1/2 cup unsulfured molasses and mix to combine.