In this work, we demonstrated that controlling the spray-drying temperature and surfactant (Tween 60) concentration, whey protein concentrate could be developed from the waste by-product of dairy industry with foaming properties that can be used in hot drinks such as café or chocolate. The obtained WPC has the moisture content, density and particle size properties typical for this type of product, which allowed it to have a foaming capacity and
stability adequate for use in hot beverages. The optimal conditions of the temperature and surfactant concentration were 210 C and 1.50 g/100 g, respectively, leading to a foaming stability of 2.15 min, which is adequate considering the hot beverage industry criteria.
Under these optimal conditions of temperature and surfactant concentration, foaming capacity of 3.80 mL, apparent density of 0.181 g/cm3 and moisture content of 1.82 g/100 g were obtained and can be considered positively because allow reducing the packaging volume. The foaming capacity and stability were according to consumer demand and comparable with the sensory characteristics of dairy products (flavor and taste).