A process for filling a container with a first frozen confection material encapsulating a second confection material, the process involving the use of a filling head； the filling head comprising: a housing having a nozzle exit, a lower first material inlet, an upper second material inlet and a reciprocatable piston movable within the housing； the piston having an outer wall and upper and lower ends and an internal material flow channel connecting an upper entry in the outer wall to an exit in the lower end, the piston, housing and inlets being positioned and dimensioned such that the piston has: (1) a lower position wherein material flows from both first and second inlets are blocked by the piston outer wall； (2) a mid position wherein the piston does not block the first inlet but the second inlet is blocked by the piston outer wall； (3) an upper position wherein the first inlet is not blocked and wherein 20 the second material inlet is in communication with the internal material flow channel； the process involving allowing frozen confection material to flow out of the nozzle exit into the container as the piston moves in an upstroke from (1) a lower position to (2) a mid position and then to (3) an upper position whereupon the first and second materials are coextruded from the exit nozzle, followed by a downstroke to (2) a mid position whereupon only first material is extruded from the exit nozzle to encapsulate the previously extruded second material, and then to (1) a lower position.L'invention concerne un procédé pour remplir un récipient avec un premier produit de confiserie congelé enveloppant un second produit de confiserie, le procédé impliquant l'utilisation d'une tête de remplissage ； la tête de remplissage comprenant : un logement comportant une sortie sous forme de buse, un premier orifice d'entrée de produit inférieur, un second orifice d'entrée de produit supérieur et un piston à mouvement alternatif mobile dans le logement ； le piston comportant une p
