Method of Preparation :
Clean the grapes (either black or rose) and smash it with a ladle. Boil this until the grapes completely dissolves in the solution. After that filter it and remove the skin and the seeds. Keep aside and allow it to cool.
Heat the water and add sugar and citric acid to it. When the sugar completely dissolves, remove from the fire and sieve through a thin cloth. Allow it to cool.
Add the grape juice in the sugar solution. Stir it well. Add the essence in it. Dissolve sodium benzoate in some water and mix it with the squash. Keep it in a dry air tight bottle.