Indonesia's Food and Medicine Supervision Agency, BPOM, confirmed 2,000 cartons of Snickers and M&Ms had been destroyed but refused to explain why or comment on the case, which Mars said had cost it half the year's predicted revenue.
The case highlights the challenges of investing in Indonesia, where officials sometimes appear to act arbitrarily.
Mars is one of several global food companies to have been caught up in China's melamine-tainted dairy products scandal. More than 10,000 Chinese children have fallen ill this year, with at least four dying, after manufacturers put dangerously high levels of the poisonous chemical in milk powder and other foods.