The present disclosure generally relates to casting molds including a casting core comprising an outer shell mold surrounding at least a portion of a casting core and a casting core comprising a second metal skin layer around a first metal component. In one aspect, at least one portion of the first metal component may be exposed on a surface of the outer shell mold. In another aspect, the outer shell mold may be configured to define a cavity in the casting core when the first metal component is removed and the second metal skin layer is not removed.