Add liquids first: Pour milk into the blender. This helps the blades catch and blend smoothly.
Add yogurt and banana: Scoop in the yogurt and break the banana into chunks.
Add blueberries and extras: Toss in frozen blueberries, vanilla, chia or flax, and spinach if using.
Sweeten only if needed: Add a small drizzle of honey or maple syrup.
Start with 1 teaspoon.
Blend until smooth: Start on low, then move to high for 30–45 seconds. Scrape down the sides if needed.
Check thickness: For a thinner smoothie, add a splash more milk. For thicker, add a few ice cubes and blend again.
Taste and adjust: If it’s not sweet enough, add another 1/2 teaspoon of honey or a few more blueberries.
Serve right away: Pour into cups with straws or a lidded cup for little hands.
Sprinkle a pinch of granola on top if you like crunch.