Snickers

Snickers

Ranking: 4
Annual sales: $441.1 million
Who makes it: Mars

Snickers claims to be history's biggest-selling candy bar. One reason: It's been around since 1930, when the milk chocolate-covered bar of nougat, peanuts, and caramel became the Mars family's second product. No snickering please—the candy was named after their favorite horse.