Kevin Nugent praised "a really good performance" after steering his side to a 6-1 victory over Colchester United in the Professional Development League on Tuesday afternoon.
Reuben Duncan, Sean O'Brien and George Alexander all grabbed two goals each in the rout of The U's - and the Under 23s boss told millwallfc.co.uk that the final result could have been even greater.
"It was a really good performance," he said. "We were up at half-time, but it could've been by more - it could've been 10.
"There were some really good individual performances and it was nice to see George back on the scoresheet again."
The win had been coming for some time for Millwall's Under 23s, who continually dominate large parts of matches on their own patch and threaten the opposition goal on numerous occasions.
Nugent stressed how despite having attacking flair at his disposal, making sure his side are secure at the back is most paramount.
"Every game is different and we try to teach them how to win games in certain different ways. The pitch wasn't great, neither were the conditions, so you have to play with a certain aspect to your game with that. You come up against different challenges every week as well, but the lads are embracing it all, so that's very pleasing.
"We're making sure that we're attacking in a realistic manner, staying nice and solid behind the ball, but there is also some real creativity in the side as well."
One man the boss and his assistant - Paul Robinson - have been without in recent weeks is Tyler Burey, who has made the step up to the first-team and appeared off the bench in recent fixtures.
"It's good for us to see Tyler in the first-team, he's an exciting player. It seems like he's improving all the time, so that can only be a good thing for the club as a whole."