Prep your fruit. Peel the banana.
Slice the avocado in half, remove the pit, and scoop the flesh into the blender.
Add the base liquids. Pour in the milk and yogurt. Start with 1 cup of milk; you can add more later if you want a thinner texture.
Sweeten to taste. Add honey or dates if your child prefers a sweeter smoothie. Ripe banana may be enough on its own.
Boost it gently. Toss in spinach, vanilla extract, and a small squeeze of lime or lemon if using.
These extras round out flavor without overpowering it.
Blend until silky. Start on low, then increase to high for 30–45 seconds. Scrape down the sides and blend again if needed. The texture should be completely smooth and creamy.
Adjust thickness. Add more milk a splash at a time if it’s too thick.
For a colder, milkshake-like sip, blend in ice cubes for 10–15 seconds.
Taste and tweak. If it needs more sweetness, add a touch more honey or a small piece of banana. If it tastes flat, a tiny extra squeeze of lemon can brighten it.
Serve right away. Pour into kid-friendly cups with straws. Sprinkle a pinch of cinnamon on top if your child likes it.