01 - Set oven to 350°F and line a 12-cup muffin tin with paper liners or lightly grease each cup.
02 - In a large mixing bowl, whisk together whole wheat flour, baking powder, baking soda, salt, cinnamon, ginger, nutmeg, and cloves until evenly distributed.
03 - In a separate bowl, whisk pumpkin puree, vegetable oil or melted coconut oil, brown sugar, granulated sugar, eggs, vanilla extract, and milk until the mixture is thoroughly blended and smooth.
04 - Gently add the wet ingredients into the bowl of dry ingredients, stirring only until the batter is just incorporated. Avoid overmixing to ensure a light texture.
05 - Portion the batter evenly among the prepared muffin cups, filling each to about three-quarters full.
06 - Place the tin on the center rack and bake for 20 to 22 minutes, or until a toothpick inserted in the center of a muffin emerges clean.
07 - Let muffins rest in the tin for 5 minutes, then transfer to a wire rack and cool completely to room temperature.
08 - When cooled, use melted chocolate or mini chocolate chips to create jack-o'-lantern faces atop the muffins. Optionally add green candies or pumpkin seeds as decorative stems.