The problem of the invention relates to compositions and methods for flavouring ready-to-drink formulations, powders, and other food products, and to compositions for use as ingredients in liquid and solid food products and nutritional supplements. The solution to the problem is to provide a method for producing a flavored ready-to-drink beverage, the method comprising adding at least one protein, in the absence of added yogurt, to a composition of Greek yogurt whey, to produce a protein-fortified Greek yogurt whey beverage, wherein the Greek yogurt whey is an aqueous system used as a base for flavored ready-to-drink beverages.
