An insulating concrete block adapted to be interlocked with other insulating concrete blocks to form an insulating concrete form for casting concrete. The insulating concrete block including a first foam panel and a second foam panel arranged in a spaced apart, parallel relationship to form a concrete receiving cavity. At least two web structures extending between the first foam panel and the second foam panel. Each web structure includes a pair of elongated end plates joined by a pair of web members. One of the end plates is embedded in the first foam panel and the other end plate is embedded in the second foam panel. Each of the end plates has at least one attachment element formed by providing a thickened area on the end plates.