This stuff is practically a science experiment. It’s packed with preservatives, hydrogenated oils, and enough sugar to stop a truck. That’s why an unopened can can last for months past its “best by” date.
But once you crack that lid open? The clock starts ticking. After opening, keep it in the fridge and use it within two to three weeks. After that, it can separate, get grainy, or develop a weird, plasticky taste. Not the vibe for your next cupcake apocalypse.
Pro tip: If you see mold—toss it. No debate. Mold on frosting is like a clown at a funeral: totally inappropriate and a clear sign to leave.
