The appearance of food products is determined visually and includes color, brightness, shape, opacity and transparency. Walnut grits are in the form of coarse flour yellowish-gray to brown up. Therefore its use as a food ingredient, particularly for pastries, could adversely affect the color of final products. In order to improve the potential use of walnut grits it seems reasonable to bleaching it. Given the fact that the grits color is determined by the specific core membrane chromophores lignins, it may be used for bleaching of hydrogen peroxide, which has an effective oxidizing agent, non-toxic and environmentally friendly (the formed products are oxygen and water).