An apparatus for preparing a beverage fit for consumption with a fine-bubble froth layer, such as coffee or cappuccino, provided with a beverage unit for dispensing a beverage under pressure, at least one nozzle to which the beverage is fed under pressure to generate a jet of the beverage, a buffer reservoir for collecting the jet of the beverage so that, in use, a liquid level of the beverage is created in the buffer reservoir into which the jet squirts to obtain the fine-bubble froth layer and an outlet path for discharging the beverage with the fine-bubble froth layer from the buffer reservoir, wherein the outlet path is provided with at least one siphon which comes into action for discharging the beverage from the buffer reservoir via the siphon when the liquid level in the siphon exceeds a predetermined height.