The Belgian forward has now scored twice in his last two games after going 12 matches without finding the net.
Benteke's last goal for the club came on Saturday as Villa earned a 2-2 draw at Liverpool in the Premier League.
"It is good that Christian is scoring again," Vlaar told the club's official website.
"It has not been easy for him the last few months but he scored against Arsenal and he scored again on Saturday so it is starting to come to him again now."
Villa return to action on January 29 when they entertain Midlands rivals West Bromwich Albion in the Premier League.