The West Ham United midfielder scored twice at Portman Road as the Young Lions recorded an emphatic 5-0 victory in their European Championship qualifier.
Gareth Southgate's side now have three wins and one draw from their opening four games of the campaign.
"I'm very happy with the performance on my second game for the Under-21s," Morrison told West Ham's official website.
"My performance was good and so was the team performance and we couldn't have hoped for much better tonight."
England Under-21s return to action on November 14 when they play host to Finland.