Crysencio Summerville's previous six goals came across a run of 56 club appearances across all competitions, five for Leeds and one for West Ham.
His form could not come at a better time with the Hammers third bottom of the Premier League and three points behind 17th-placed Nottingham Forest.
They host Bournemouth on Saturday before going to Liverpool on 28 February with Summerville having rediscovered the form which convinced West Ham to spend big on him.
"He's in a good moment, he is full of confidence, everything he does seems to go well so we need to take advantage of it," said boss Nuno Espirito Santo.
"It's confidence, all players know how it is. It's all about confidence. He is in a good moment and he is working for the team. You cannot play in the Premier League if you don't have self-confidence."
Nuno refused to concede he should have brought Summerville on earlier than the 83rd minute but felt making 10 changes was the right decision for his team.
"Sometimes you get it right and sometimes you don't but it's what the team needs, more important than anything is the respect for the players who started the game," he added.
"We knew Burton would come on strong, every throw-in and ever set-piece is a situation that requires maximum attention, and the players did well in that aspect.
"There were some tired legs in extra time and Summerville helped us out. When he is one v one and in space, he is almost unstoppable."
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