The present invention relates to a method and an apparatus for producing a chocolate product. The method includes delivering liquid chocolate having a viscosity through a pipe along a delivery path to a production station for producing the chocolate product. The liquid chocolate includes solid particles suspended within the liquid chocolate. The method changes the viscosity of the liquid chocolate by applying an electric field to the liquid chocolate in a direction along the delivery path of a strength and duration determined to aggregate the suspended solid particles into streamlined shapes extending along the direction of the delivery path.