Dominic Calvert-Lewin scored his second hat-trick of the season as Everton booked their place in the Carabao Cup quarter-finals, but the cost of victory against West Ham may turn out to be a heavy one.
Calvert-Lewin put the home side in front with a well-taken 11th-minute effort after Michael Keane had picked him out with an excellent chipped pass over the Hammers' defence.
The England forward sealed victory with two goals in six minutes near the end, taking his tally in what is turning into a superb season to eight.
His second was a typical poacher's effort, the 23-year-old tucking home the rebound after Alex Iwobi's shot had bounced back off a post.