Herrera, who was bought for 28.8 million pounds, had never scored two goals in one game prior to the match against Villa.
Having scored seven goals in all competitions this season, Herrera is determined to keep adding to his tally.
"It was a great day, one of the best in my professional career," Herrera told MUTV. "It's the first time I have scored twice in (one game in) my career, so I am very happy.
"It is my top-scoring season. Now, I want to keep scoring more to help the team."