Place the milk, pumpkin puree, banana, vanilla extract, and maple syrup in a blender. Blend until smooth.
Taste the smoothie to see what it’s like without the seasonings. Then add the cinnamon, plus a pinch of ground ginger and nutmeg. Taste again and add a little more seasoning as needed. If you add too much, put in a little more pumpkin puree and milk until it tastes just right.