01 - Preheat oven to 350°F. Line a 12-cup muffin tin with paper liners or grease lightly with non-stick spray.
02 - In a medium mixing bowl, whisk together all-purpose flour, baking powder, baking soda, salt, cinnamon, nutmeg, cloves, and ginger until evenly blended.
03 - In a large bowl, whisk pumpkin puree, vegetable oil, eggs, granulated sugar, light brown sugar, and vanilla extract until smooth and homogeneous.
04 - Gently incorporate the dry mixture into wet ingredients, stirring just until combined. Do not overmix; a few small lumps are acceptable.
05 - Evenly distribute batter into muffin cups, filling each about two-thirds full. Drop one generous teaspoon of marshmallow creme atop each portion and swirl lightly with a toothpick or skewer.
06 - Place muffin tin in the oven and bake for 20–22 minutes, or until a toothpick inserted into the muffin (excluding marshmallow center) emerges clean.
07 - Remove muffins from oven, allow to cool in the tin for 5 minutes, then transfer to a wire rack to cool fully before serving.