Puffed rice (rice murmure) refers to rice which are made by exploding cooked cereal from a pressure chamber, thus expanding the grain to several times its original size. The principle of the puffing process is heating the cereal, in a pressure chamber in presence of steam.
Puffed rice is used in snack foods and breakfast cereals, in the form of rice cakes and is also a popular street food in some parts of the world. Puffed rice is an ingredient of bhel puri, a popular Indian chat item. It is also used in temples and gurudwaras as prasad. They can be sweetened with milk or prepared into a savory dish with salt and vegetables. Snacks and food items that can be made from puffed cereals are bhel puri (rice), cheese puffs, Golden Crisp, puffed rice toffee, puffed rice upma, puffed rice porridge.
Puffed cereals are a good source of protein and complex carbohydrates. It’s fine as a snack or a single meal, as long as eating other proteins (such as beans, spinach, meat, cheese or eggs) during the day. Puffed rice is about 10 times the volume of regular grain, therefore a cup of plain puffed rice would have about 20-25 calories.  Puffed rice are low in calories and fat content and hence ideal for weight watchers.