Fired food product which microwave-reheated affect of crust not crispness. The cause of this problem is the water molecule evaporates and moves out of food effect to water content of food. And operation of microwave is electromagnetic field that is molecule alignment and migration of charge ions in the rapidly
This study use mackerel nugget which is coated with hydrocolloid, hydroxypropylmethylecellulose (HPMC), in batter. The HPMC coating inhibits effectively the diffusion of water molecules from mackerel meat into the crust during microwave-reheated. Measurement and analysis consist of color and oil content of crust, crispness of crust in batter and bread mackerel nugget.