Methods of embedding at least one fastener in a sandwich structure having an ordered three-dimensional microstructure core provided between a pair of facesheets. The method includes attaching the at least one fastener to a first facesheet. The method also includes irradiating a volume of photo-monomer in a reservoir with light beams to form an ordered three-dimensional microstructure core around the at least one fastener. The method also includes attaching a second facesheet to the ordered three-dimensional microstructure core to form the sandwich structure. The fasteners embedded in the sandwich structure are configured to facilitate attachment of the sandwich structure to another structure.