Preheat your oven to 350°F (175°C) and line a muffin tin with paper liners.
In a large bowl, whisk together the flour, baking powder, baking soda, salt, cinnamon, nutmeg, and cloves.
In another bowl, mix together the melted butter, brown sugar, eggs, pumpkin puree, and vanilla extract until smooth.
Gradually add the wet ingredients to the dry ingredients, stirring until just combined.
Divide the batter evenly among the muffin cups, filling each about ⅔ full.
Bake for 20-25 minutes, or until a toothpick inserted into the center comes out clean.
Let the muffins cool in the tin for 5 minutes, then transfer to a wire rack to cool completely.