The Terps outscored the Scarlet Knights 10-3 in the second half.
Three players — Daniel Maltz, Jared Bernhardt and Logan Wisnauskas — netted hat tricks Friday evening.
Benson was named interim offensive coordinator just weeks before the season started.
It's the first time the Terps have hit 20 goals in a conference game since 1983.
The Great Danes outscored the Terps 5-1 in the final frame.
The Terps scored four straight goals late, but they fell short.
Jared Bernhardt, Chris Brandau, Daniel Maltz, and Matt Rahill earned plaudits for their performances against Penn on Saturday.
“[When] teams make a mistake, if you can pump one in, it does go a long way."
Attackmen Daniel Maltz and Jared Bernhardt led the way with nine combined goals.
The Terps scored their most goals in a game since 2013.