Some of the largest chocolate makers in the world are warning we are running out.

Suppliers Mars and Barry Callebaut say that a chocolate deficit is looming - whereby farmers produce less cocoa than the world eats.

The Washington Post says this is now becoming the norm, rather than the exception.

It says we are in the middle of what could be the longest consecutive chocolate shortage in more than 50 years.

Last year, the world ate roughly 70,000 metric tons more cocoa than it produced. By 2020, the two chocolate-makers warn that number could grow to one million metric tons.

By 2030, there are fears the deficit could reach two million metric tons.

What's more, there are worries that the price of cocoa could be on the rise.

Cocoa - which is the base ingredient for chocolate - has surged by at least 10% this year. That comes after a 20% increase last year.

The rise in price is led mostly by emerging market demand, and some analysts believe chocolate may eventually become a luxury item.