Pour cooled coffee and milk into your blender. If you’re using hot coffee, let it chill first or your smoothie will be soup with a steam bath.
Add the frozen banana, vanilla, cinnamon, and maple syrup. Yes, banana is a secret weapon here—trust the texture.
Toss in a handful of ice cubes. More ice means thicker texture, which some of us secretly crave at 7 a.m.
Blend on high until perfectly smooth. If it’s too thick, splash in a little more milk; if too thin, add another ice cube and pulse again.
Taste and adjust sweetness or spice. Want more cinnamon? Go for it. Want less sweet? Dial back the syrup.
Pour into a tall glass, add a straw, and pretend you’re a fancy coffee shop barista in real life.