Add milk in a pan and let it boil. When milk starts boiling, put the gas flame off. Now add the solution of 2 tsp vinegar and 2 tsp water. Now collect the chhena in a cloth. Tie the knot of the cloth and hang it for half hour.
After half hour mash the chhena with hand for 2-3 min then again mash it with palm for 10-15 min so it comes it dough form.
Now take portion from dough and make balls from it. Make sure that there is no cracks in the balls.
Now add sugar, green cardamom and 3 cup water in a pan and let it boil. When it starts boiling, add rasgulla balls. Cover it and cook for 3-4 min in high flame then again cook for 10-15 min in low to medium flame.
After 15 min rasgulle are cooked. Leave it for cool. It takes 6-7 hours to be ready. After 6-7 hour, rasgulle are ready. Serve it.