Cannibal Cupcake | Wiki Verified

It's also possible that the user is referring to a pastry item that's named as such. Some bakeries do create unusual names for desserts, like horror-themed cupcake collections. Maybe there's a bakery that sells a cupcake called "Cannibal Cupcake," and they want verified info on that product. That seems plausible. Alternatively, it could be a product that sparked controversy for some reason, hence the need for verification.