An apparatus for refining cocoa, comprising: - a disk , rotating about an axis of rotation (I), which is provided, on both of its opposite sides, with a plurality of teeth; and - a pair of fixed plates 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 (I) and is delimited by two facing conical surfaces , defined by respective mutually intersecting generatrices and by an axis of revolution corresponding to said axis of rotation (I); - obtained on said first conical surfaces are first circular series of teeth that have cutting edges oriented in a direction transverse with respect to the circular profiles followed by the respective series of teeth; - each plate comprises a channel , which extends along a closed profile about said axis of rotation (I), facing said channel of said corresponding side of said disk , and is delimited by two facing conical surfaces , defined by respective mutually intersecting generatrices and by an axis of revolution corresponding to said axis of rotation (I); and - obtained on said second conical surfaces are second circular series of teeth , which are designed to co-operate with said first series of teeth 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 (I), which is provided, on both of its opposite sides, with a plurality of teeth; and - a pair of fixed plates 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 (I) and is delimited by two facing conical surfaces , defined by respective mutually intersecting generatrices and by an axis of revolution corresponding to said axis of rotation (I); - obtained on said first conical surfaces are first circular series of teeth that have cutting edges oriented in a direction transverse with respect to the circular profiles followed by the respective series of teeth; - each plate comprises a channel , which extends along a closed profile about said axis of rotation (I), facing said channel of said corresponding side of said disk , and is delimited by two facing conical surfaces , defined by respective mutually intersecting generatrices and by an axis of revolution corresponding to said axis of rotation (I); and - obtained on said second conical surfaces are second circular series of teeth , which are designed to co-operate with said first series of teeth and have cutting edges oriented in a direction transverse with respect to the circular profiles followed by the respective series of teeth. <EOS>