The Irishman - third in last season's NextGen Series goal charts - scored against Arsenal in his first game back following a foot injury.
"It was great to see Mikey back," Cowans told Villa's website.
"Mikey is always a threat. His movement is very good and he just needs people to put him through and he'll finish his opportunities.
"For Mikey that is what it is all about - scoring goals - and that's what he did at Arsenal."
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