Within six minutes, Batshuayi was poking home a close-range finish and getting mobbed by teammates in front of Chelsea's jubilant visiting fans.
The Blues went in to the game seven points ahead of second-placed Tottenham with three games to play so they knew a win would be enough to wrap-up the trophy.
Spurs lost at West Ham 1-0 last week to give Chelsea three opportunities to clinch the league.
The Italian became the fourth manager - after Jose Mourinho, Carlo Ancelotti and Manuel Pellegrini - to win the Premier League in his first season in English soccer, and he was thrown in the air by his celebrating players in joyous scenes after the final whistle.
After West Brom's Salomon Rondon forced Chelsea keeper Thibaut Courtois to tip over his bar in the opening seconds, the game settled down into a sluggish first half.
"Michy paid me a lot with this change", Conte said.
Donald Trump Skips Another White House Tradition: Cinco de Mayo
Finally, Levario said, Mexican-Americans may see connections between both countries surrounding the holiday. Other U.S. cities that throw big celebrations for Cinco de Mayo are Denver, New York, Phoenix and Houston.
"Consistently we have been the best team in the league", Chelsea defender Gary Cahill said.
Manager Antonio Conte, who arrived in the summer to guide the team after a disappointing 2015-16 season, thereafter altered his side to play with three at the back, and that proved the catalyst for a 13-match winning streak that proved to be the decisive run as they claimed the crown. Chelsea have been the best team this season, with an honourable mention for Tottenham, and the title is rightly theirs, and the magnificent Conte's.
Given that they are the two foremost jokesters and pranksters of the squad, it's perhaps unsurprising that Diego Costa and David Luiz were not going to stand for this affront to their merrymaking for too long.
The end of the evening was in stark contrast to the start, as a stubborn West Brom defended deep and in numbers and frustrated Chelsea.
Chelsea had the game's first big chance on 11 minutes through Eden Hazard but his low strike inside the area was blocked by Gareth McAuley before Ben Forster gathered the loose ball.
Chelsea finally broke the deadlock in the 82nd minute thanks to Batshuayi who got the final touch on Cesar Azpilicuerta's cross.
Comments