Preheat the oven to 375 degrees F. Line a 9 x 13 baking pan with parchment paper or foil, extending the sides up the edges of the pan, and set aside.
Sift Flour, baking soda, cinnamon, ginger, cloves, and salt into a bowl. Set aside.
2 1/4 cups all-purpose Flour, 2 teaspoons baking soda, 1 teaspoon ground cinnamon, 1 teaspoon ground ginger, 1/2 teaspoon ground cloves, 1/4 teaspoon salt
In large mixing bowl, combine butter and brown sugar until fluffy. Add egg and blend until smooth. Add molasses and combine.
3/4 cup unsalted butter, 1 cup packed brown sugar, 1 large egg, 1/4 cup molasses
Add in flour mixture in thirds and blend until combined.
Place cookie dough into baking dish, pressing with fingers, and bake for 15-18 minutes.
Remove from oven and cool completely before frosting.