Make the paste of 1/2 cup of sweet corns and 1/2 cup of water in a blender.

Heat a cooker, add 2 1/2 cups of water, remaining one cup of sweetcorn, carrot, beans smooth sweetcorn paste, salt, sugar, black pepper. Cook it for 8 to 10 minutes on medium flame. Remove foam from the spoon. Take 2 tsp of cornflour in water. Pour cornflour batter in soup. Cook it for 1 minute, add butter cook it for 30 seconds. Turn off the flame. Sweetcorn soup is ready to serve.