The present invention relates to a method for preparing a lupin-sourced protein-enriched preparation comprising the steps of: (a) solubilising the proteins from lupin meal using alkaline conditions, (b) precipitating the solubilised proteins, and (c) solubilising the precipitated proteins of step (b); from which lupin milk and derived products is made through (a) diluting the lupin-sourced protein-enriched preparation, and (b) blending fat, carbohydrate, and whitening ingredients to achieve desired organoleptic and nutritional qualities.