Grease a loaf pan and set aside.
In a bowl, combine flour, baking powder, baking soda, salt, cinnamon, ginger, cloves, and nutmeg. Stir until well-dispersed.
In a large bowl, combine brown sugar and shortening. Using a hand mixer, cream together until smooth and fluffy.
Add eggs one at a time, beating after each addition. Add pumpkin and milk to egg mixture. Stir until combined.
Add flour mixture to pumpkin mixture and stir until just smooth.
Pour into prepared loaf pan and bake in a 350 F oven for about 60 minutes or until a toothpick inserted in the middle comes out clean.
Remove from oven and brush top with butter, if desired. Allow to slightly cool and remove from pan. Slice into serving pieces.