Abstract: The present disclosure provides a novel and gentle process for producing oat-based products containing oat proteins that have good functional properties, including solubility, emulsifying, foaming and gelling properties. This process includes hydrolysis to break down carbohydrates, physical separation to remove insoluble fibers, and membrane filtration to concentrate oat proteins by the removal of sugars. The method can include providing an oat mixture; hydrolyzing the oat mixture with an enzyme or a combination of enzymes; physically separating an insoluble material from the hydrolyzed oat mixture to form a soluble hydrolyzed oat mixture; applying membrane filtration to the soluble hydrolyzed oat mixture using a membrane having molecular weight cut-offs (MWCO) greater than 100 kDa.