A mixing chamber for use in a beverage carbonation system is provided. In one embodiment, the carbonation mixing chamber includes a housing, a fluid inlet pathway, a gas inlet pathway, and an outlet pathway. The housing may have an inner chamber, and the fluid inlet pathway can be configured to extend into the inner chamber of the housing and receive fluid from a fluid source. The gas inlet pathway can be configured to extend into the inner chamber of the housing and can be configured to receive gas from a gas source. The gas inlet pathway can include a plurality of nozzles positioned within the inner chamber and configured to direct gas in a plurality of directions that differ from one another. The outlet pathway can be configured to dispense a mixture of fluid and gas from the inner chamber.