01 - Preheat the oven to 350°F. Line a 12-cup muffin tin with paper liners or grease lightly.
02 - Whisk together all-purpose flour, baking soda, salt, ground ginger, cinnamon, cloves, and nutmeg in a large bowl until smooth.
03 - In a separate bowl, beat vegetable oil and brown sugar until smooth. Add eggs one at a time, beating well. Stir in molasses and vanilla extract.
04 - Pour the wet mixture into dry ingredients. Add buttermilk and fold gently until just combined, avoiding overmixing.
05 - Divide batter evenly among muffin cups. Sprinkle coarse sugar on top if desired.
06 - Bake for 18 to 20 minutes or until a toothpick inserted in the center comes out clean.
07 - Let muffins cool in the tin for 5 minutes, then transfer to a wire rack to cool completely.