Eriksen, signed on a free transfer in January eight months after suffering a cardiac arrest on the pitch at Euro 2020, had a hand in two late goals for Ivan Toney.
With five minutes remaining Eriksen, starting his second match for the Bees, lifted in a perfect cross for Toney to head home at the far post.
“It was a quality cross from Eriksen and a great header from Ivan," smiled Bees boss Frank. “We've seen things like that against us a few times this season, but this time it was a bit of quality from us.
“There is still more to come from him. Maybe not 10 top crosses a game, but more sharpness in the big moments. He's at a good level now but the last bit will take some time.
“For me it was not a gamble. I was convinced he could help us and that he could be the best signing ever for Brentford.
“It was not an injury, it was a heart condition. So he wouldn't have lost any speed or anything. There's a mental issue but when he decided he wanted to play that was it."