01 -  Preheat oven to 350°F. Line a 12-cup muffin tin with paper liners or lightly grease each cup. 
 02 -  In a medium mixing bowl, whisk together the flour, baking soda, baking powder, salt, cinnamon, nutmeg, and cloves until evenly blended. 
 03 -  In a large bowl, whisk together pumpkin puree, eggs, vegetable oil, granulated sugar, light brown sugar, and vanilla extract until the mixture is smooth and homogenous. 
 04 -  Gradually add the dry mixture to the wet ingredients, stirring gently with a rubber spatula until just combined. Avoid overmixing to retain a tender crumb. 
 05 -  Gently fold in butterscotch chips and semi-sweet chocolate chips, ensuring even distribution throughout the batter. 
 06 -  Divide the batter evenly among the prepared muffin cups, filling each approximately three-quarters full. 
 07 -  Bake for 20 to 22 minutes or until a toothpick inserted in the center of a muffin emerges clean or with a few moist crumbs. 
 08 -  Allow muffins to cool in the pan for 5 minutes, then transfer to a wire rack to cool completely before serving.