FIELD: food industry.SUBSTANCE: method envisages recipe components preparation. The prepared rye fermented malt, rye unfermented malt and barley malt are crushed. The prepared scorzonera is cut, dried in the microwave field to theresidual humidity of about 20% at the microwave field power providing heating scorzonera to the temperature of 80-90°C inside the bits during at least an hour, roasted and crushed. The rye fermented malt, rye unfermented malt and scorzonera in an amount of about 7.5% by weight of the cereal product are mixed with hot water, stirred for 10-15 minutes, barley malt is added, and maintained for about 1 hour. Adding the remainder of hot water, stirring for 10-15 minutes, maintaining for about 1 hour, cooling and sedimenting for 10-12 hours are performed. The phase separation is carried out. Heating the liquid phase to the temperature of 50-60°C, adding sugar, boiling out, adding lactic acid, and boiling out until the dry substances content is equal to about 57% are performed. The sediment is mixed with hot water, maintained for about 1 hour, the phases are separated, and the liquid phase is concentrated until the dry substances content is equal to about 57%. The resulting concentrates are mixed to obtain the desired product.EFFECT: preparing the recipe components for kvass concentrate, allowing to increase the foam stability of kvass obtained from concentrate.Способ предусматривает подготовку рецептурных компонентов. Подготовленные ржаной ферментированный солод, ржаной неферментированный солод и ячменный солод дробят. Подготовленный скорцонер нарезают, сушат его в поле СВЧ до остаточной влажности около 20% при мощности поля СВЧ, обеспечивающей разогрев топинамбура до температуры внутри кусочков 80-90°C, в течение не менее 1 часа, обжаривают и дробят. Смешивают ржаной ферментированный солод, ржаной неферментированный солод и скорцонер в количестве около 7,5% от массы зерновых продуктов с горячей водой, перемешивают в течение 10-15 минут, добавля
