The king of cookies is turning 100 this year!

A century later, whatever their secret is, it's still working -- worldwide sales were $2 billion last year.

Intrepid CTV Montreal reporter Rob Lurie took a tour of the Montreal Oreo plant to ask the tough questions... like how they double stuff the cream.

He also asks the Quebec Oreo eater, "Are you a separatist when it comes to Oreos?"

Click the video on the right to watch his report.