Four mangos blended with two cups of water and sugar to taste. Thirty seconds in the blender, two glasses, and how much water goes in decides whether it is a juice or a smoothie.
Four mangos to two cups of water is the ratio, and it is the only decision in this recipe. Less water gives something thick enough to eat with a spoon; more gives a thinner juice that goes further. Colombian juices are usually made this way rather than squeezed, so the pulp stays in and the drink has body. Ripe mango matters more than anything else here. There is no cooking and nothing to hide behind: a mango that is still firm gives a juice that tastes green and needs a lot of sugar to be drinkable. The skin should give under a thumb and the fruit should smell of mango at the stem. Thirty seconds in the blender is enough. Longer whips air into it and the juice turns pale and foamy.