Shoppers in 1968 had no idea how lucky they were. You don't come across many burnt sugar cake recipes, but back in the 1950s and 1960s, this was a go-to sweet treat. Unsurprisingly, Duncan Hines ...

I've substituted dark molasses for the more traditional browning or burnt sugar essence. However, despite adaptations, the cake's blackness, rich density, and ever-present tingle of rum — which ...