A week on from their hard-fought 1-0 triumph at Liverpool, the Eagles blew the Hammers away on home soil and raced into a three-goal lead inside the opening 20 minutes, the earliest that they have ever lead by a 3-0 scoreline in Premier League history.
Star winger Olise put Oliver Glasner's men ahead in the seventh minute with a close-range header after meeting a delightful ball from Joachim Andersen, who found himself in an unfamiliar left-wing position following a corner.
An exquisite acrobatic effort from Eberechi Eze doubled the hosts' advantage shortly before Emerson Palmieri prodded Will Hughes's cross into his own net.
Olise then turned provider for fellow attacker Jean-Philippe Mateta, flashing the ball across the face of goal for the Eagles striker to slide home a fourth from close range just after the half-hour mark.
Olise makes Premier League history in five-star Palace displayMateta added his second and Palace's fifth midway through the second half, in between a strike from Michail Antonio and a late own goal from Dean Henderson, and Glasner's men eventually celebrated back-to-back Premier League wins for the first time this season.
Olise, who has been linked with a host of top Premier League clubs including Manchester United, Manchester City, Arsenal and Chelsea ahead of the summer transfer window, was one of the standout performers for Palace, and his two goal contributions have seen him set a new Premier League record.
Indeed, at the age of 22 years and 131 days old, Olise is the youngest player to have been directly involved in 10 or more goals in each
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