Prep the banana: For the thickest smoothie, peel and slice a ripe banana, then freeze it for at least 2 hours. If you’re short on time, use a fresh banana and add ice.
Add liquids first: Pour the milk into the blender.
Starting with liquid helps the blades run smoothly.
Add the rest: Toss in the banana, peanut butter, and any add-ins like vanilla, cinnamon, or protein powder.
Blend until smooth: Start on low, then increase to high for 20–40 seconds, or until creamy. Scrape down the sides if needed.
Taste and adjust: If you want it sweeter, add a touch of honey or a date and blend again. For a thicker smoothie, add more frozen banana or a few ice cubes.
Serve right away: Pour into a glass.
For a little flair, sprinkle cinnamon on top or drizzle extra peanut butter.