An apparatus for refining cocoa, comprising: - a disk, rotating about an axis of rotation, which is provided, on both of its opposite sides, with a plurality of teeth; and - a pair of fixed plates (4, 6) opposed to one another, positioned between which is said rotating disk, each plate facing a corresponding side of said disk and being provided with a plurality of teeth configured for co-operating with the plurality of teeth of said corresponding side of said rotating disk; said apparatus being characterised in that: - each side of said disk comprises a channel, which extends along a closed profile about said axis of rotation and is delimited by two facing conical surfaces (22, 23), defined by respective mutually intersecting generatrices and by an axis of revolution corresponding to said axis of rotation; - obtained on said first conical surfaces (22, 23) are first circular series of teeth (22B, 23B) that have cutting edges oriented in a direction transverse with respect to the circular profiles followed by the respective series of teeth; - each plate (4, 6) comprises a channel (41, 61), which extends along a closed profile about said axis of rotation, facing said channel of said corresponding side of said disk, and is delimited by two facing conical surfaces (42, 43, 62, 63), defined by respective mutually intersecting generatrices and by an axis of revolution corresponding to said axis of rotation; and - obtained on said second conical surfaces (42, 43, 62, 63) are second circular series of teeth (42B, 43B, 62B, 63B), which are designed to co-operate with said first series of teeth (22B, 23B) and have cutting edges oriented in a direction transverse with respect to the circular profiles followed by the respective series of teeth. - a disk, rotating about an axis of rotation, which is provided, on both of its opposite sides, with a plurality of teeth; and - a pair of fixed plates (4, 6) opposed to one another, positioned between which is said rotating disk, each plate facing a corresponding side of said disk and being provided with a plurality of teeth configured for co-operating with the plurality of teeth of said corresponding side of said rotating disk; - each side of said disk comprises a channel, which extends along a closed profile about said axis of rotation and is delimited by two facing conical surfaces (22, 23), defined by respective mutually intersecting generatrices and by an axis of revolution corresponding to said axis of rotation; - obtained on said first conical surfaces (22, 23) are first circular series of teeth (22B, 23B) that have cutting edges oriented in a direction transverse with respect to the circular profiles followed by the respective series of teeth; - each plate (4, 6) comprises a channel (41, 61), which extends along a closed profile about said axis of rotation, facing said channel of said corresponding side of said disk, and is delimited by two facing conical surfaces (42, 43, 62, 63), defined by respective mutually intersecting generatrices and by an axis of revolution corresponding to said axis of rotation; and - obtained on said second conical surfaces (42, 43, 62, 63) are second circular series of teeth (42B, 43B, 62B, 63B), which are designed to co-operate with said first series of teeth (22B, 23B) and have cutting edges oriented in a direction transverse with respect to the circular profiles followed by the respective series of teeth.