With player of the match Payne Haas and fellow big man Tino Fa'asuamaleaui leading the charge the Kangaroos blew the game open before their rivals had time to settle.
The world champions opened their account in the fifth minute when Haas took a short ball from Isaah Yeo and carried three defenders over the tryline with him to make it 6-0.
Four minutes later it was skipper James Tedesco leaving Izack Tago in his wake on the left edge before Fa'asuamaleaui powered over in the 13th minute and the Kangaroos had a 16-0 lead.