The invention is directed to a process for preparing beer or a beer-like beverage with enhanced foaming properties, to beer or a beer-like beverage, and to the use of a native potato protein isolate as foam stabilising agent. The process of the invention comprises adding a native potato protein isolate to the beer, wherein the native potato protein isolate has a protein content of 90 % or more based on dry matter as determined from the weight of total Kjeldahl nitrogen multiplied by 6.25.
