Vacuum frying is a process of frying food items using a vacuum frying machine, which operates at a lower atmospheric pressure than standard atmospheric pressure. In this process, the water and oil in the food evaporate at a lower temperature, which prevents the formation of acrylamide and other harmful compounds.
Vacuum frying typically involves pre-treating the food item by blanching or coating it with a thin layer of batter or coating. The food is then placed in a vacuum frying machine, where it is fried at a temperature of around 120-140°C (248-284°F) under a vacuum pressure of 50-80 kPa (0.5-0.8 atm). The lower atmospheric pressure allows the moisture to escape at a lower temperature, which helps to retain the food's natural color, texture, and flavor.
Vacuum frying is often used to produce healthier snacks, such as fruit and vegetable chips because it reduces the amount of oil that is absorbed by the food during frying. It also reduces the formation of harmful compounds, such as acrylamide, which is a potential carcinogen that can form when starchy foods are cooked at high temperatures.
