The 18-year-old cracked home the fourth goal of a rousing second-half display from the hosts, and is keen to bring attacking menace to United's midfield after excelling as a striker with Crewe Alexandra last term.
"It's great to make my debut," Powell told MUTV. "To then cap it off with a goal is what I've been working for. Dario (Gradi, Crewe's director of football) used to say my game isn't just attacking and defending, it's about goals as well and I proved that last season and hopefully I can do that for United."
Despite his impressive cameo, however, the summer signing from Crewe insists that he will keep his feet on the ground and continue learning from his elder peers. "My dad will keep me in touch, I'll tell you that," he laughed. "No, I'm just going to go home, have this great feeling and I'll keep myself on the ground.
"When I first came on it scared me a little bit, to be fair, because I'm only used to 5,000 people now and then, but it's a great atmosphere - the fans are great. It wasn't the hardest game because they made it easier for me but I'm happy to be on the pitch getting minutes.
"I learn every day, especially from the midfielders - Scholes, Carrick, Giggsy - they're all great, they've all been through it and won trophies. That's what I want to do, so I hope to learn off them every day."