01 - Adjust oven rack to the center and preheat to 350°F. Line a 12-cup muffin tin with paper liners and set aside.
02 - Whisk flour, baking powder, baking soda, salt, cinnamon, ginger, nutmeg, and cloves in a medium bowl until evenly distributed.
03 - In a large mixing bowl, blend together vegetable oil, granulated sugar, brown sugar, and eggs until smooth. Stir in pumpkin purée, milk, and vanilla extract until fully incorporated.
04 - Gradually fold the dry ingredient mixture into the wet mixture, mixing just until the batter is combined. Avoid overmixing.
05 - In a separate bowl, whisk molasses, brown sugar, melted butter, ginger, cinnamon, cloves, and nutmeg until a smooth batter forms.
06 - Spoon pumpkin batter into each liner, filling about two-thirds full. Add a generous teaspoon of gingerbread swirl on top, then use a toothpick or skewer to gently swirl the mixtures for a marbled appearance.
07 - Bake for 20 to 22 minutes, or until a toothpick inserted in the center of a muffin emerges clean.
08 - Let muffins rest in the tin for 10 minutes, then transfer each to a wire rack to cool completely before serving.