The invention discloses a preparation method of pure-butter and
sugar-free
dark chocolate with anti-oxidation and anti-aging effects and relates to the technical field of chocolate production. The preparation method comprises the following steps: step 1, adding a cocoa butter material to a hydrogenation reactor, performing hydrogenation refining on the cocoa butter material, and finally, removinglight components by
flash evaporation to obtain treated cocoa butter; step 2, adding the cocoa butter to a
thermal insulation container to be molten; step 3, adding the molten cocoa butter to a refiner to be ground; step 4, transferring ground chocolate paste to a high-speed shear emulsifying
machine to be concentrated under reduced pressure; step 5, transferring the sheared chocolate paste to a stirring device to be stirred; step 6, then pouring the chocolate paste into a mold, and performing cooling molding to prepare chocolate material blocks; and step 7, packaging and storing the chocolatematerial blocks. The preparation method can improve
oxidation resistance by cooperation of all components and processes.