Beverage discharge disposition adapted for frothing a liquid food product, in particular milk, comprising a discharge casing provided in the front region of a beverage preparation machine, and that provides discharge of at least two types of beverages into a recipient underneath thereof, whereby 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; characterized in that said discharge casing further presents: - a second 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, presenting milk flux selection means and comprising all components exposed to the milk circulation in said machine including a second beverage discharge, whereby said milk circulation disposition is provided so that can be manually attached in removable manner on said attached part of discharge casing, so that said second beverage discharge results next to said first beverage discharge inside of said discharge casing, whereby said milk circulation disposition presents a first structural part adapted so as to provide support to said milk flux selection means and to said milk entry connection, and further presents a second structural part adapted so as to provide support to a vapour entry connection, whereby said first and second structural parts (9a, 9b) are configured as elements that can be manually pressure-fitted with each other, and whereby said first and second structural parts (9a, 9b) are adapted so that support one air valve disposition, one flow distribution disposition and one milk discharge, along a general upstream to downstream direction, whereby said milk circulation disposition comprises one flow distribution disposition adapted so that presents said milk entry connection and said vapour entry connection, and that provides flow connection, by means of pressure fitting, with said air valve disposition, and with said second beverage discharge, whereby said flow distribution disposition is retained in exterior walls of said first and second structural parts (9a, 9b), whereby said milk flux selection means are adapted so that provide a regulation of air flow, by means of said air valve disposition, inside of said milk circulation disposition, and thereby of the type of milk flow discharged through said second beverage discharge, whereby said air valve disposition comprises a regulation disc of air flux, provided in a food grade metallic league, and whereby said milk flux selection means and said beverage type selection means are provided in different regions and planes of said discharge casing, and whereby said milk flux selection means are provided in a lateral region of said removable part of discharge casing, and said beverage type selection means are provided on a frontal region of said attached part of 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; characterized in that said discharge casing further presents: - a second 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, presenting milk flux selection means and comprising all components exposed to the milk circulation in said machine including a second beverage discharge,