1. Preheat oven to 350°F. Lightly oil a mini muffin pan or coat with nonstick spray.
2. Whisk together flour, cinnamon, nutmeg, allspice, cloves, baking powder, and salt in a large bowl.
3. In another bowl, whisk pumpkin puree, milk, brown sugar, canola oil, egg, and vanilla bean paste until smooth.
4. Pour wet ingredients over dry ingredients; stir gently until just combined.
5. Scoop batter into the prepared muffin pan. Bake for 10-12 minutes until a toothpick comes out clean.
6. Combine 2 tbsp cinnamon and granulated sugar in a bowl.
7. Dip warm donut holes in melted butter, then roll in cinnamon sugar to coat.
8. Place on a wire rack to cool completely.