Preheat-oven to 400 degrees F. and lightly grease muffins tins with butter or a non-stick cooking spray. Set aside.
In a small mixing bowl, lightly beat the egg with a hand-held electric mixer. Add the milk, vegetable oil, pumpkin, and sugar, and thoroughly combine all ingredients.
In a large mixing bowl, sift together the cinnamon, nutmeg, cloves, baking powder, and flour. Stir to combine.
Add the pumpkin mixture to the dry ingredients and stir thoroughly to combine, making sure all ingredients are blended.
Fill muffin tins with a heaping tablespoon or two of the batter, until about half-full. Shake gently to level, and bake for about 20 minutes. Remove the muffins from the oven and let cool in the tins for about a half-hour. Serve warm. May store in an airtight container for 1 week, or freeze for up to 1 month.