Breakfast Cereal Food is one kind of crispy food which is processed by twin-screw extruder and takes grist as basic material. For many of us, ready-to-eat breakfast cereals are still a staple food, and a good one can be the perfect kick-start to the day. The majority are fiber-flimsy, and either too sugary or too salty. A number of studies suggest that eating breakfast improves kids’ learning ability. Its outstanding characteristic is containing abundant compound carbohydrate and meal fiber.