an automated beverage brewing system includes a liquid storage tank and a metering chamber . the metering chamber is at least partially submerged beneath a standing level of liquid in the storage tank . the chamber includes a sealable liquid inlet port communicating with the interior of the storage tank beneath the standing level of liquid . the chamber also includes a liquid outlet port and an aperture that receives compressed air , wherein the compressed air forces liquid from the liquid output port of the chamber for use in preparing a brewed beverage . a pump provides the compressed air and a controller monitors a pressure signal value indicative of the air pressure in the metering chamber . the controller commands the pump on to commence flow of liquid from the metering chamber . the controller then commands the pump off several seconds after detecting a drop in air pressure within the chamber . a baffle is affixed to the distal end of a shaft , which is moved between a first and second position . in the second position the baffle seals a section of the storage tank to form the metering chamber . the system may also include a second brew pump that allows a user to customize the quantity of liquid delivered from the brewing system for a stronger brewed beverage .