It's not everyday you eat a baked good named after a power outage. The Brooklyn Blackout Cupcake ($4) from Ladybird Bakery, formerly Two Little Red Hens Bakery, in Park Slope involves so much chocolate—chocolate cake, chocolate pudding center, chocolate fudgey frosting, chocolate cake crumbs sprinkled on top—you might actually black out from sugar overload. Also, this is the type of cupcake you eat with a fork.
The Blackout cake's history is as rich as the ingredients. Ebinger's, the late New York bakery chain, was famous for the very dark brown (basically black) cake. So unless you find proper time travel equipment—the bakery originated in 1898, grew to 54 stores, and closed the last one in 1972—freak out your glucose levels at Ladybird.