A rear bracket for a wall-mounted, appliance shelf assembly includes a central portion that defines a plurality of receiving wells. A first mounting portion extends parallel to the central portion and is configured to align with a first wall of an appliance cabinet. A second mounting portion extends perpendicular to the central portion and is configured to align with a second wall of the appliance cabinet. The second wall is positioned perpendicular to the first wall. A first fastener is configured to couple the first mounting portion with the first wall. A second fastener is configured to couple the second mounting portion with the second wall.