Prep the banana: If using fresh banana, slice it. For a thicker smoothie, use frozen banana slices.
Add liquids first: Pour in the milk and yogurt.
This helps the blades catch everything and blend smoothly.
Layer the rest: Add banana, nut or seed butter, oats, vanilla, cinnamon, and avocado if using.
Sweeten if needed: Add honey or maple syrup to taste. Do not use honey for children under 1 year.
Blend until very smooth: Start low, increase to high, and blend 30–45 seconds. Add a splash more milk if it’s too thick, or a few ice cubes if you want it colder.
Taste and adjust: For a richer drink, add another teaspoon of nut/seed butter or a little coconut milk. For a milder flavor, add a bit more banana or milk.
Serve right away: Pour into a small cup with a straw or a toddler-friendly open cup.
You can also serve it in a bowl with a spoon.