"Hostess" Iron Man
Series of one-page comic advertisements starring Iron Man in the Bronze Age.

Suiting up in his classic red-and-gold armor, Iron Man used Hostess goodies to tackle numerous foes bent on destroying Stark Industries. Strangely, Iron Man was always more interested in changing back to Tony Stark as quickly as possible.
The Charge Of The Rhinos!
The Rhinos
The Incredible Hulk #260
Attacking Fort Knox, a group of criminals used hulking electronic rhinoceros machines to wade through both the military defenses and Iron Man. Luckily, Iron Man was able to distract the pilots with an offering of Hostess Twinkies - which shut down the Rhinos for good.
Rust Be My Destiny!
Waterman
The Spectacular Spider-Man #9
Seeking the Hostess Cupcakes in the break room at Stark Industries, the hydro-manipulating Waterman was out to drown every employee standing in his way. Attempting to rust Iron Man proved to be faulty, as a repulsor blast turned the villain into steam.
Kwirkegard
Using his Existential Depression Ray on New York's water supply, the sinister philosopher Kwirkegard attempted to drown the city in sorrow. Taking down the villain with a single punch, Iron Man convinced the children to spread their joy - and Hostess Twinkies - across New York to counter the ray's effects.
Iron Man In The Hungry Battleaxe!
Battleaxe
Amazing Spider-Man #202
Garbed in a classic suit of knight's armor, the man called Battleaxe encountered Iron Man while breaking into a uranium vault. Playing on his foe's hunger, Iron Man presented Battleaxe with Hostess Fruit Pies; the villain opted to chow down and forget entirely about the uranium theft.
Iron Man In An Irresistible Force!
Hy Torque
Amazing Spider-Man #189, Fantastic Four #203
Operating out of an armored vehicle, Hy Torque and his crew were set to ram the Van Ness mansion gates when Iron Man set himself in their path. Tossing the criminals Hostess Twinkies, the gang was distracted long enough for Shellhead to crush the car and use it as their temporary prison.
"Iron Man VS. The Bank Robbers"
Marvel Tales #122 The Incredible Hulk #254
Having stormed the First State Bank and taken hostages, a crew of bank robbers were persuaded to allow a tray of Hostess Fruit Pies to be sent in. Iron Man soon followed and disarmed the gang, having used the treats as a distraction tactic.
Monotony Man
Rejected in his early days, the self-proclaimed Monotony Man used his powers of ennui to dampen an April Fool's Day celebration. Needing to uplift the crowd, Iron Man distributed Hostess Cupcakes to the revelers as Monotony Man made his escape.
"Brains Over Brawn"
Schemers
The Avengers #183
Having obtained a tank, a pair of villains set about a takeover of Stark Industries by attacking Iron Man. As IM easily halted their tank's advances, Stark did offer his defeated foes Hostess Fruit Pies after immobilizing them.