The invention relates to a method and to a control circuit for controlling an electrohydraulic braking system for motor vehicles, said system being preferably controlled in a "brake-by-wire" operating mode. Said system comprises a pressure supply device that can be regulated by an electronic control and regulation unit, formed by a cylinder-piston assembly, the piston of said assembly being actuated by an electromechanical actuator. A pressure target value is determined for the pressure supply unit. To provide a control method that permits the hydraulic pressure produced by the pressure supply device (2) to be controlled effectively, according to the invention the pressure is controlled (401), or the actuator position of the pressure supply device (2) is controlled (420) in accordance with the magnitude of the pressure target value (PV,Soll).