A gas turbine engine component is provided. The gas turbine engine component comprises a platform, a platform cooling core circuit inside of the platform, an airfoil extending from the platform, and a plurality of one-wall pedestals inside the platform cooling core circuit. The plurality of one-wall pedestals partially extend from only a first endwall of the platform cooling core circuit toward a second endwall of the platform cooling core circuit. The gas turbine engine and a system for cooling an airfoil platform of a gas turbine engine component are also provided.