Load the liquid first. Add water or milk to the blender base so blades catch everything easily.
Add the spinach. Pack in the 2 cups. This blends smoother when it's closer to the blades.
Drop in fruit. Add frozen mango and the banana. Frozen fruit makes it thick and frosty.
Boost smartly. Add lime/lemon juice, chia or flax, a pinch of salt, and ice if needed.
Blend until silky. Start low, ramp to high for 30–45 seconds. You want zero leafy flecks and a creamy texture.
Taste and tweak. Too thick? Add a splash more liquid. Not sweet enough? Another few mango chunks or half a banana.
Pour and serve. Drink immediately for the best flavor and texture. Garnish with a lime wedge if you're feeling fancy.