Jon Fisher, Matthew Cox, Mark Odejobi, Rob Miller, Luke Eves and captain Hugo Ellis also touched down as England won 60-18.
Youngs first score came following his own 70-metre break and he added his second in the second half as England followed up their opening win over Fiji with another convincing victory.
England: Noah Cato (Saracens); Mark Odejobi (London Wasps), Luke Eves (Bristol Rugby), Alex Tait (Newcastle Falcons), Charlie Sharples (Gloucester Rugby); Rob Miller (Newcastle Falcons), Ben Youngs (Leicester Tigers); Billy Moss (Bath Rugby), Joe Gray (Northampton Saints), Scott Freer (Leeds Carnegie), Courtney Lawes (Northampton Saints), Gregor Gillanders (Leicester Tigers), Jon Fisher (London Irish), Matthew Cox (Worcester Warriors), Hugo Ellis (London Wasps, captain).
Replacements: James Clark (London Irish) for Gray 53, Alex Corbisiero (London Irish) for Freer 54, Ben Thomas (Saracens) for Ellis 41, Scott Hobson (Cornish Pirates) for Fisher 51, Joe Simpson (London Wasps) for Youngs 64, Miles Benjamin (Worcester Warriors) for Odejobi 53.
Scorers: Tries: Youngs 2, Fisher, Cox, Odejobi, Miller, Eves, Ellis, Cato. Conversions: Miller 6, Penalty: Miller
