A building panel structure is disclosed, in which building panels are used to form a structure. The building panel includes a core and a coating covering a portion of the core. In some embodiments the core consists of a frame and at least one insulating structural block. The insulating structural blocks can be encapsulated polystyrene (EPS) foam blocks. In some embodiments the coating includes ceramic material. In some embodiments the coating includes a scratch layer and a main brown layer. In some embodiments the scratch layer and the main brown layer are interdigitated to increase the strength and durability of the coating and the building panel. In some embodiments the building panel includes a construction board formed separate from the core. The construction board is formed of coating mixtures and applied to the core after the coating mixtures have cured.