Soak the raisins (optional but recommended): Add raisins to a small bowl and cover with hot water for 10 minutes. Drain well.
This softens them and blends away any chewiness.
Pre-grind the oats (optional for ultra-smooth texture): Pulse rolled oats in the blender until they look like a fine flour. This helps the smoothie turn silky.
Load the blender: Add milk, yogurt, banana, soaked raisins, oats, vanilla, cinnamon, and a pinch of salt. If you want an extra-cold smoothie, add ice.
Blend until completely smooth: Start on low, then increase to high for 45–60 seconds.
Scrape down the sides if needed and blend again.
Taste and adjust: Add maple syrup or honey if you want more sweetness. If it’s too thick, splash in more milk. If it’s thin, add a few ice cubes or another spoonful of oats and blend again.
Serve immediately: Pour into a chilled glass.
For a cookie-like finish, sprinkle a little cinnamon on top.