Combine flour, baking soda, cream of tartar, salt, nutmeg, cloves, and cinnamon in a medium bowl.
Combine the brown sugar and sour cream in a large bowl. Add the beaten egg to the sugar and sour cream mixture. Add the dry ingredients to the sour cream mixture; stir until well blended.
Pour the batter into an 8x8-inch nonstick cake pan, sprayed with nonstick cooking spray. Bake at 350 degrees for 30 minutes.