The nostalgia-laden packaged treat has inspired creative interpretations at restaurants and bakeries across the country.

Farmer's "brownie" contained no chocolate ... the 1893 Chicago World's Fair that a Boston merchant debuted the first American-made chocolate bars.) Following the Palmer House's chocolatey creation ...

Brownie Wise was a self-made woman with a genius ... extending her legacy in American business.

These lower-fat black bean brownies taste totally lush and are worth every calorie! Just keep a close eye on them in the oven, as they can become dry if overcooked. Who says you can't eat cake on ...