Beverage discharge disposition adapted for frothing a liquid food product, in particular milk, comprising a discharge casing adapted so that can be provided in the front region of a beverage preparation machine, characterized in that said discharge casing presents: - an attached part associated to the casing of said beverage preparation machine and that presents selection means of beverage type, including a milk option, and a first beverage discharge for discharge of a first beverage type, such as for example coffee; - a part that is removable from the discharge casing and corresponds to a milk circulation disposition providing removable flow connection to an exterior supply recipient to said machine, and comprising all components exposed to the milk circulation in said machine including a second beverage discharge, whereby said milk circulation disposition presents: - selection means of milk flux that provide regulation of the air flow through an air valve disposition and are provided on a lateral region of said discharge casing, whereas said beverage type selection means are provided on a front face of said discharge casing, - a milk entry connection adapted so that provides connection of said milk circulation disposition to a milk supply recipient provided outside of said beverage preparation machine by means of a connection that includes at least one location with possibility of rotation around several planes, - a vapour entry connection adapted so that provides connection to a vapour supply provided upstream of said discharge casing, by means of a vapour exit nozzle provided on said attached part of discharge casing, and - a second beverage discharge for discharge of the liquid food product to be frothed, provided so that can be jointly attached in removable manner as single element, by means of pressure-fitting, in said attached part of discharge casing, so that it is thereby provided a removable flow connection of said vapour exit nozzle with said second beverage discharge, whereby said milk circulation disposition presents a first part adapted so as to provide support to said milk flux selection means and to said milk entry connection, and configured so as to provide an exterior surface that develops in coherent manner in relation to the remanding exterior surface of said discharge casing when said milk circulation disposition is placed in said discharge casing, and further presents a second part adapted so as to provide support to said vapour entry connection, whereby said milk circulation disposition is adapted so that can be attached in removable manner to a lateral portion of said attached part of discharge casing, by means of displacement in transversal manner relative thereto, whereby said milk circulation disposition is provided so that can be manually attached in removable manner to said attached part of discharge casing, so that said second beverage discharge is arranged next to said first beverage discharge inside of said discharge casing. - an attached part associated to the casing of said beverage preparation machine and that presents selection means of beverage type, including a milk option, and a first beverage discharge for discharge of a first beverage type, such as for example coffee; - a part that is removable from the discharge casing and corresponds to a milk circulation disposition providing removable flow connection to an exterior supply recipient to said machine, and comprising all components exposed to the milk circulation in said machine including a second beverage discharge, - selection means of milk flux that provide regulation of the air flow through an air valve disposition and are provided on a lateral region of said discharge casing, whereas said beverage type selection means are provided on a front face of said discharge casing, - a milk entry connection adapted so that provides connection of said milk circulation disposition to a milk supply recipient provided outside of said beverage preparation machine by means of a connection that includes at least one location with possibility of rotation around several planes, - a vapour entry connection adapted so that provides connection to a vapour supply provided upstream of said discharge casing, by means of a vapour exit nozzle provided on said attached part of discharge casing, and - a second beverage discharge for discharge of the liquid food product to be frothed,