I peel a whole lemon and toss it into this citrus smoothie, not just the juice, for a bright, zesty kick. Frozen mango and banana mellow the tartness and kale rounds it out, all in 5 minutes.
Pour the water into a blender. Add the kale and lemon and blend on high until smooth.
Add the mango and banana. Blend on high until smooth, 45 to 60 seconds, adding a splash more liquid if it's too thick. Pour into a glass and serve immediately.
Notes
Lower Sugar: For a less sweet smoothie, swap the banana for 1/4 avocado or 1/4 cup frozen cauliflower.
Greens Swap: Use other leafy greens in place of the kale. Spinach is milder.
Lemon Tip: Peel the lemon well, since too much white pith tastes bitter. In a pinch, use 1 to 2 tablespoons lemon juice instead.
Storing: Best fresh, but it keeps in a sealed jar in the fridge for up to 24 hours. Shake before drinking.