Add the liquid first to your blender — pour in the milk and vanilla extract so the blades can spin freely without getting stuck.
Layer the soft ingredients next: add the yogurt, spinach, honey (if using), then the frozen banana slices on top of those.
Finish with the frozen berries at the very top. This layering order prevents the blender from jamming and ensures everything gets pulled down evenly as it blends.
Secure the lid tightly and start blending on low for 10 seconds to break up the fruit, then increase to medium-high speed. Blend for about 30–45 seconds total until you see no visible chunks remaining and the mixture looks uniform in color.
Stop the blender once and check the consistency by lifting off the lid — it should pour slowly but not drip like water. If it's too thick, add an extra splash of milk (about 2 tablespoons at a time) and pulse until smooth. If it's too thin, add more frozen fruit or ice cubes.
Pour immediately into glasses. The best texture is within the first five minutes — it starts to separate slightly after that. Serve right away with a straw for the full experience.