A spout for a beverage-making machine for producing a foam for a beverage from a pressurized mixture comprising a liquid containing gas bubbles, the spout comprising: a spout enclosure having an inlet receiving the pressurized mixture and an outlet conveying the foam out of the spout enclosure; a plurality of screens disposed in series within the spout enclosure for successively screening the pressurized mixture, each screen having a plurality of holes therein and consecutive screens of said series having a screen spacing therebetween, the successive screening of the pressurized mixture progressively transforming the gas bubbles therein into foam bubbles of a smaller and generally uniform size, thereby producing the foam; a transitional volume disposed between the inlet and the plurality of screens, the transitional volume comprising an input region receiving the pressurized mixture from the inlet, and an output region conveying the pressurized mixture to the plurality of screens; a mixing chamber disposed between the inlet and the transitional volume; and a turbulence mechanism imparting turbulence to the pressurized mixture within said mixing chamber, wherein the turbulence mechanism comprises an inlet port disposed between the inlet of the spout enclosure and the mixing chamber, the inlet port being narrower than the inlet and the mixing chamber thereby restricting a flow of the pressurized mixture from the inlet to the mixing chamber, and an outlet port disposed between the mixing chamber and the input region of the transitional volume, the outlet port being narrower than the mixing chamber and the input region thereby restricting a flow of the pressurized mixture out of the mixing chamber and into the input region, characterized in that each screen comprises a screen size in the range of about 40 μm to about 300 μm and the mixing chamber is adapted to receive the pressurized mixture from the inlet, maintain the pressurized mixture under pressure in the mixing chamber, and convey the pressurized mixture to the input region of the transitional volume. a spout enclosure having an inlet receiving the pressurized mixture and an outlet conveying the foam out of the spout enclosure; a plurality of screens disposed in series within the spout enclosure for successively screening the pressurized mixture, each screen having a plurality of holes therein and consecutive screens of said series having a screen spacing therebetween, the successive screening of the pressurized mixture progressively transforming the gas bubbles therein into foam bubbles of a smaller and generally uniform size, thereby producing the foam; a transitional volume disposed between the inlet and the plurality of screens, the transitional volume comprising an input region receiving the pressurized mixture from the inlet, and an output region conveying the pressurized mixture to the plurality of screens; a mixing chamber disposed between the inlet and the transitional volume; and a turbulence mechanism imparting turbulence to the pressurized mixture within said mixing chamber, wherein the turbulence mechanism comprises an inlet port disposed between the inlet of the spout enclosure and the mixing chamber, the inlet port being narrower than the inlet and the mixing chamber thereby restricting a flow of the pressurized mixture from the inlet to the mixing chamber, and an outlet port disposed between the mixing chamber and the input region of the transitional volume, the outlet port being narrower than the mixing chamber and the input region thereby restricting a flow of the pressurized mixture out of the mixing chamber and into the input region, characterized in that each screen comprises a screen size in the range of about 40 μm to about 300 μm and the mixing chamber is adapted to receive the pressurized mixture from the inlet, maintain the pressurized mixture under pressure in the mixing chamber, and convey the pressurized mixture to the input region of the transitional volume.