Hughton, appointed in the summer after Paul Lambert left for Villa, felt this performance was the most satisfying of the campaign so far, with a third win in five league games, which have included four clean sheets.
He said: "It is, simply because it is Manchester United.
"They tested us more than anybody we have played against and were resilient enough.
"I suppose with the run we are on, the confidence we have from that we were able to show.
"It is certainly a wonderful achievement."
"It is a great feeling tonight because it is Manchester United, but it is still about three points," he said.
"We had a few good performances at the start of the season where we did not get the points from our performances, so it was so vital we can pick up points.
"We have proved we can do, but we have to play our game at that level, because if we fall below that, then we can get beat.
"If we do that, it will give us a chance."