01 - Heat the oven to 350°F. Grease and line a 9x5-inch loaf pan with parchment paper.
02 - Whisk together flour, baking powder, baking soda, salt, ground ginger, cinnamon, cloves, and nutmeg in a large bowl.
03 - In a separate bowl, whisk vegetable oil, brown sugar, and molasses until smooth. Add eggs one at a time, then stir in milk, grated ginger, and vanilla extract.
04 - Pour wet ingredients into the dry ingredients and mix until just combined, taking care not to overmix.
05 - Gently fold in chopped crystallized ginger if using.
06 - Pour batter into prepared loaf pan and smooth the surface.
07 - Bake for 50 to 55 minutes, or until a toothpick inserted in the center comes out clean.
08 - Allow the loaf to cool in the pan for 10 minutes, then transfer to a wire rack to cool completely.
09 - Dust with powdered sugar before serving if desired.