His volleyed pass set up Michu for the opener and then skipped past two defenders before drilling a low cross that Wayne Routledge bundled in for the second.
A measured pass to Ben Davies was his telling contribution in the third goal, again scored by Routledge.
"In the first games he had to adapt," said Laudrup of £5.55m signing Hernandez. "But he's getting better and better.
"The last month he's been really great. Outstanding."
Laudrup had targeted victory over West Brom to reach halfway to the
"magic" 40-point mark
that typically ensures Premier League survival.
Twenty points from their first 14 games leaves Swansea six points better off than they were under Brendan Rodgers a year ago in their debut Premier League season.
Swansea went on to finish in 11th place, and Laudrup believes the fine start will allow his players to take on the league's leading clubs - starting with Arsenal on Saturday - without the constraints that comes with the pressure of worrying about survival.
"It's against a big club and away game where we have not so much to lose and we can just go and play our game with 20 points in our pocket. It's nice," he said.
This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.