Preheat oven to 350F and line muffin tins. Combine flour, cocoa powder, allspice, cloves, salt, and baking soda in a medium bowl. Whisk together molasses, sugar, vegetable oil, egg and vanilla in a large bowl. Alternate whisking the flour mixture and water until just combined. Divide batter evenly between muffin cups. Bake for 25-30 minutes (until toothpick inserted comes out clean). Let cool for 5 minutes before transferring to a wire rack.