The Nittany Lions nearly came all the way back from a 13-8 fourth-quarter deficit against the defending national champion.
Lamar Stevens' 25-point, 8-for-12 shooting effort paced the Nittany Lions to their third victory in four games.
An offensive explosion powered Penn State past Wisconsin in Friday night's series opener.
Sandy Barbour will make an average of $1,269,000 per year as part of the new deal, which runs through August 2023.
Wisconsin (10-15-5, 6-9-5 Big Ten) has struggled to keep the puck out of its net this season, and its best defensemen may be out of the lineup due to injury this weekend.
Amari Carter and Siyeh Frazier, who also posted her career high, tallied game highs with 18 points each.