Add the almond milk and canned pumpkin puree to the blender first so the blades have liquid to grab.
Add the frozen banana, protein powder, pumpkin pie spice, almond butter, and maple syrup.
Top with the ice cubes.
Blend on high for 45 to 60 seconds, stopping once to scrape down the sides, until completely smooth with no protein powder flecks.
Check the consistency. If it's too thick to pour, add a splash more almond milk and blend for 10 more seconds.
Pour into a tall glass and dust with extra pumpkin pie spice if you like. Drink right away.