Brooklyn blackout cake is what Ebinger's Baking Company sold across Brooklyn from 1898 until the company folded in 1972. It is a three-layer devil's food cake with chocolate pudding between the layers, finished with chocolate buttercream and rolled in chocolate cake crumbs. The whole thing is, by design, structurally absurd.
Joe Murphy runs Bakehouse by Joe Murphy in New Providence, New Jersey. He resurrected a defunct Brooklyn bakery's signature dish and brought it across the river to compete against Bobby Flay, who is from New York and should, in theory, have known what a real blackout cake tastes like.
He didn't. Or he did and didn't execute. Either way, Murphy won by being more loyal to Ebinger's than Bobby was.