Booked: Akpan (min. 42), Warnock (min. 71).
Rashford now has 24 goals in 79 appearances for United and also opened up his competitive global account for England, earlier this month when he scored the victor during England's World Cup qualifier against Slovakia, at Wembley.
On Rashford, Lingard added: "If he plays down the middle, he is bound to score goals".
Marcus Rashford's first-half brace was followed by goals from Jesse Lingard and Anthony Martial to give United a 4-1 win, with Lloyd Dyer scoring a consolation in stoppage time. It was evident from the start of the game it was going to be a long night for their Championship opponents.
But instead of commending Rashford for his performance, Mourinho was quick to heap praise on his whole side as they booked a spot in the fourth round of the Carabao Cup.
"You have got to keep them happy and if there are four or five players moaning and groaning in the dressing room, you will probably have a losing team".
UN Chief: Burma Rohingyas are victims of ethnic cleansing
His comments came as the UN Security Council condemned the violence that has led almost 380,000 Rohingyas to flee to Bangladesh . The chief of United Nations human rights, Zeid Ra'ad al-Hussein, has named it as ' a textbook example of ethnic cleansing '.
He instinctively chipped his first effort into the net before lashing his second in off the post from 20 yards out. In each game, we set them ourselves. They were nearly invited back in by Victor Lindelöf, who allowed Joe Mason in on goal.
Joe Mason's tame chip was comfortably saved by Sergio Romero on 26 minutes, and United nearly punished Burton immediately as Juan Mata struck the post.
Batshuayi got his second from Hazard's pass in the 53rd minute and the Belgian striker completed his treble four minutes from full-time, with Forest replying through Tendayi Darikwa in the closing moments.
It was a cruel deflection that beat the Burton goalkeeper but there was excellent work from Anthony Martial in the build-up as he shown some excellent trickery to make some space in the final third.
The visitors were relieved to go in at the break only 3-0 down given the amount of chances Mourinho's men created.
Jose Mourinho made nine changes to the team which beat Everton 4-0 as Michael Carrick made his first start of the season.