Abstract: In order to study the performance of air fryer cooking French fries, while taking into account the intuitive visual feelings of consumers, and scientifically evaluate the cooking performance of air fryer, based on the shade chart developed by the Dutch Potato Processing Industry Association (V.A.V.Ⅰ), according to CIELab color space and GB/T 7921—2008 "Uniform color space and color difference formula", the color of French fries cooked in air fryer was studied. The relationship between color card and color value is established by color ability index, the overall color situation is reflected by color uniformity, and the sensory color is transformed into numerical expression. The results show that the coloring ability of most air fryer cooking fries can reach more than 75%, and the coloring ability of some air fryer cooking fries can approach 90%. The overall color uniformity of fries cooked in air fryer is about 90%. The indexes of color ability and color uniformity are easy to be understood by consumers, and lay a foundation for color evaluation of the cooking performance of air fryer, and provide a reference for related research fields.

Key words: Air fryer, CIELab color space, Cooking