01 - Preheat oven to 350°F. Line all twelve wells of a standard muffin tin with paper liners.
02 - In a medium bowl, thoroughly whisk together flour, baking powder, baking soda, salt, cinnamon, nutmeg, and cloves.
03 - In a separate large bowl, whisk pumpkin purée, granulated sugar, brown sugar, vegetable oil, eggs, and vanilla extract until uniform and smooth.
04 - Add the dry mixture to the wet ingredients. Using a spatula, fold gently until just combined; avoid overmixing.
05 - Fold in white chocolate chunks, reserving a few pieces for topping if desired.
06 - Evenly divide batter among muffin liners, filling each cup about three-quarters full. Place reserved chocolate chunks on top.
07 - Bake on the center rack for 20 to 22 minutes, or until a toothpick inserted in the center of a muffin emerges cleanly.
08 - Allow muffins to cool in the tin for 5 minutes. Transfer to a wire rack and cool completely before serving.