Start with bananas that are already peeled, sliced, and frozen solid, since this step is what gives the smoothie its creamy texture. If you forgot to freeze yours ahead of time, a fresh banana with a handful of ice will work in a pinch. I like keeping a bag of pre-sliced frozen bananas in my freezer just for mornings like this.
Add your frozen banana, pumpkin puree, yogurt, almond milk, and pumpkin pie spice straight into the blender. If you're using honey or maple syrup, pour that in now too. Layering the liquid closer to the blades first helps everything blend more evenly.
Blend on high for about 30 to 60 seconds, stopping to scrape down the sides if needed. You're looking for a completely smooth, thick consistency with no chunks of banana or pumpkin left behind. If it looks too thick to move, splash in a bit more almond milk.
Taste your smoothie and decide if it needs to be thinned out or sweetened further. A little extra milk loosens it up, while a touch more honey rounds out the flavor if your pumpkin tasted flat. This is the step where I make it taste exactly the way I want.
Pour the finished smoothie into glasses right away, since it's at its best when freshly blended and cold. I like topping mine with a sprinkle of cinnamon or a few extra pumpkin seeds for a little crunch on top.