The meat turned out to be from 1 percent to 5 percent horse meat, The Daily Telegraph reported Saturday.
Officials said they do not know if any of it was eaten by students.
"It's very important to emphasize that there is no risk whatsoever to people's health from consuming horse meat, but obviously we all want to be certain that we know exactly what we are eating," Cathy Fullerton, a member of the Edinburgh council, said.
The horse meat scandal began when horse DNA was discovered in beef products distributed in Britain and Ireland, and has spread to a number of European countries.
In France, the scandal has actually increased the popularity of horsemeat, which had been declining for decades.