The invention relates to a method for obtaining polyphenol-rich cocoa powder with a low fat content and to the cocoa thus obtained. The method optionally includes a phase comprising the purification of the polyphenols obtained from the defatted cocoa cake using an Amberlite column. The end product has a particle size of less than 3 mm for 99 % of the particles and a polyphenol content of preferably between 60 and 90 % and a fat content of less than 12 % in relation to the weight of the dry matter.