Preheat oven go 350ºF (180ºC). Line the bottom of a 9 x 5-inch loaf pan with parchment paper. Grease the insides and dust with a mixture of equal parts flour and cocoa powder.
In a medium-size bowl, whisk together the flour, cocoa powder, cinnamon, ginger, baking powder, baking soda, salt, nutmeg, and cloves until well blended
In a large bowl, beat the brown sugar, oil, eggs and vanilla together until smooth.
In a small bowl, whisk together the sour cream and milk.
Add flour the mixture to the batter in two additions, alternating with the milk mixture, beating just until combined.
Transfer the batter to the prepared pan. Bake until a toothpick inserted into the center comes out clean, about 38-45 minutes.
Cool the loaf in the pan for 10 minutes, then turn the loaf out onto a cooling rack to cool completely. Frost with cream cheese frosting.