Aam panna

Aam panna, Aam Jhora, or panha is an Indian Summer drink. It is made from unripe mangoes and is yellow to light green in color. Mint leaves are often added to the drink, enhancing its green color. Unripe mango is a rich source of pectin, which gradually diminishes after the formation of the stone. Unripe mango is sour in taste because of the presence of oxalic, citric and malic acids.

Source: Wikipedia