Iron filings

Iron filings are a kind of Cybertronian seasoning. They also come in "flavorful" form.

Fiction

Marvel The Transformers comics

Iron filings are delicious when combined with lead sulfide crystals and "savory" mercury sauce. Recipe for Disaster!

Animated cartoon

Random Blitzwing noted that he liked iron filings on his servo salad. Sari, No One's Home

Iron filings are one of the many ingredients of Garbage O's. Transformers Animated: The AllSpark Almanac

My Little Pony/Transformers

For the Preppin' with Pinkie cooking show, Gauge decided to cook her famous iron filling casserole, much to the audience's disgust. Pinkie Pie later tried a bite, but quickly discovered the dish wasn't exactly compatible with Equestrian taste buds. They Eat Ponies, Don't They?