Blackout cake is a traditional chocolate cake originating from Brooklyn's Ebinger's Bakery, where it was first made in 1942. This rich, dark sponge cake is filled with thick pudding-like chocolate custard and topped with crumbs of chocolate cake.

The ingredients used for the cake typically include dark chocolate, espresso powder, flour, cocoa powder, baking soda and powder, butter, salt, sugar, eggs, and milk. Once prepared, the cake is often decorated with buttercream, but it's completely optional.

Its dark visual appearance is a nod to the mandatory blackouts that happened at the time (WWII) in order to protect the Brooklyn Navy Yard.