May cocoa bean futures fell to $8,850 a tonne in Tuesday trading, the lowest since March 21, follows from ICE Futures data.
The cost of the raw material was below $9,000 for the last time on March 22.
The most active contract in New York fell as much as 17% to $8,800 a tonne, the largest intraday drop on record since 1960.
Cocoa beans fell even further on Thursday, hitting a low of $7,510 per tonne in the morning, ICE Futures data showed. However, since the second half of the day, futures have been trading above $8,000.