Cutting calories - Chewy Gingerbread Cookies

How can cut the fat and calories in this recipe:
http://backtoherroots.com/2014/12/05/chewy-gingerbread-cookies/
Ingredients
1 1/2 sticks butter, softened
1/4 cup granulated sugar
1/2 cup packed brown sugar
1/4 cup molasses
1 egg
1 teaspoon vanilla extract
2 teaspoons baking soda
1 teaspoon ground cinnamon
2 teaspoons ground ginger
1/4 teaspoon ground cloves
1/8 teaspoon black pepper
1/2 teaspoon salt
2 cups all-purpose flour
Granulated sugar, for rolling

Instructions
1.Preheat oven to 350°.
2.In the bowl of a stand mixer fitted with a paddle attachment, cream together the butter and sugars until light and fluffy. Add in the molasses, egg, and vanilla and mix until well-combined.
3.Add in the baking soda, cinnamon, ginger, cloves, pepper, and salt, and mix until just combined. Add in the flour and mix until well-combined, scraping the sides as needed.
4.Chill the dough for at least 30 minutes. Then roll the dough into 1-inch balls, and roll each dough ball in granulated sugar. Place on an ungreased baking sheet, spacing them 2-inches apart.
5.Bake in preheated oven for 7-8 minutes, or until the cookies just begin to crack and crinkle, and the edges barely start to brown. Do not overbake or they won't be chewy!
6.Let cookies cool for a minute or two on the cookie sheet, then transfer to a cooling rack to cool completely.