Combine Ingredients: In a blender, add the pumpkin puree, banana, milk, pumpkin pie spice, and maple syrup.
Blend: Blend on high until the mixture is smooth and creamy. If you want a colder smoothie, add a few ice cubes and blend again.
Taste and Adjust: Taste your smoothie and adjust sweetener or spice to your liking.
Serve: Pour into a glass and, if desired, top with whipped cream and a sprinkle of pumpkin pie spice.