Prep your lime: Wash it, then zest about 1 teaspoon using a microplane or fine grater.
Cut the lime and squeeze 2 tablespoons of fresh juice. Avoid the bitter white pith when zesting.
Load the blender: Add 1 cup full-fat coconut milk, 1/2 cup coconut water, 1 frozen banana, lime juice, lime zest, 1 to 2 teaspoons honey or maple syrup, and a small splash (1/2 teaspoon) vanilla extract. Add a pinch of sea salt if you like.
Adjust the chill: If your banana isn’t fully frozen, toss in a handful of ice for a thicker, colder smoothie.
Blend until silky: Start on low, then increase to high for 30–45 seconds, until perfectly smooth and creamy.
Scrape down the sides if needed.
Taste and tweak: Want more tang? Add a squeeze of lime. Need more sweetness?
Add another teaspoon of honey or maple. Looking for lighter texture? Splash in extra coconut water.
Serve right away: Pour into a chilled glass.
Garnish with a lime wheel, a sprinkle of shredded coconut, or a few torn mint leaves.