01 - Preheat oven to 350°F. Line a standard 12-cup muffin tin with paper liners or lightly grease each cavity.
02 - Whisk together all-purpose flour, baking soda, baking powder, salt, cinnamon, nutmeg, and cloves in a medium mixing bowl.
03 - In a large mixing bowl, whisk pumpkin puree, eggs, vegetable oil, granulated sugar, light brown sugar, and vanilla extract until smooth.
04 - Gradually add the dry mixture into the wet ingredients, stirring gently until just combined. Avoid overmixing to preserve tenderness.
05 - Fold in the butterscotch chips and semi-sweet chocolate chips using a spatula until evenly distributed.
06 - Divide batter evenly among the muffin cups, filling each approximately three-quarters full.
07 - Bake for 20 to 22 minutes, or until a toothpick inserted in the center comes out clean or with a few moist crumbs.
08 - Let muffins rest in the pan for 5 minutes, then transfer to a wire rack to cool completely.