To add some heat to their sweets, the makers of Atomic Fireballs, the Ferrara Candy Company, add a bit of a chemical called capsaicin, a little molecule that also gives hot peppers their kick.

The former CEO of one of Chicago’s oldest and most successful candy companies — Ferrara, the maker of Lemonheads, Atomic Fireballs and ... was CEO of the merged company, called Ferrara Candy ...