Wash the raw mangoes and then pressure cook with 2 cups of water for 2 whistles. OR cook in a pan with enough water till they become soft OR steam cook in the pressure cooker
Now remove the mangoes from the cooker and let them cool down completely.
Remove the peel ,take out the pulp and discard the seed.
Grind mint leaves using the water in which you have boiled the raw mangoes.
Now take a big bowl or a tall jug and add 2 cups of water ,the boiled raw mango pulp and the water in which you have added mint and all the spices.
Now using a hand blender mix everything to make a smooth mixture(you can keep it sight chunky if you wish, I prefer it slightly chunky.
Fill it in a glass bottle and keep refrigerated.
How To serve- Add few ice cubes in the glass ,now fill it 2/3 with aam panna and then pour chilled water and stir well.
Garnish- Rub the glass rim with lemon slice and dip in kashmiri chili powder and black salt mix, Garnish with few fresh mint leaves