Sugar syrup is also known as chasni in Hindi. A variety of Indian sweets are coated with sugar syrup. Boil sugar and water together to make sugar syrup. Take a few drops of the syrup in a small bowl and cool it down to check the consistency. Then, using your thumb and fingers, press the syrup between them to determine its consistency. If a single little thread forms, your one-string chasni or sugar syrup is ready.