Prep the dates: Remove the pits. If they’re dry, soak them in warm water for 5–10 minutes, then drain.
Add to the blender: Combine banana, dates, milk, nut or seed butter, vanilla, cinnamon, and salt.
Blend until smooth: Start on low, then increase to high for 30–60 seconds.
Scrape down the sides if needed.
Adjust thickness: Add ice for a colder, thicker smoothie or a splash more milk to thin it out.
Taste and tweak: For more sweetness, add another date. For more richness, add another spoon of nut or seed butter.
Serve immediately: Pour into a chilled glass and enjoy right away for the best texture.