01 - Preheat the oven to 350°F. Line a 12-cup muffin tin with paper liners or lightly grease each compartment.
02 - In a large mixing bowl, whisk together pumpkin puree, mashed banana, eggs, oil, milk, and vanilla extract until evenly blended.
03 - In a separate bowl, combine all-purpose flour, granulated sugar, brown sugar, baking soda, baking powder, salt, cinnamon, nutmeg, and ginger.
04 - Add the dry mixture to the wet mixture and gently combine until just mixed, ensuring not to overmix.
05 - Gently fold in chopped nuts or chocolate chips if desired.
06 - Divide the batter evenly among the muffin tin compartments, filling each about three-quarters full.
07 - Bake for 20 to 22 minutes, or until a toothpick inserted into the center of a muffin comes out clean.
08 - Let the muffins cool in the pan for 5 minutes, then transfer to a wire rack and allow to cool completely.