The invention relates to a method for preparing a food ingredient, comprising:- providing a mixture of starch-, protein-, and dietary fibre-containing food base material, water, a yeast, a lactic acid-producing bacterium and optionally one or more other ingredients； and- subjecting the mixture to a fermentation step, thereby forming lactic acid.The invention also relates to a fermented food ingredient, to a method for the preparation of a food, to a food and use of a food ingredient or food especially in farming.
