Cooper's side racked up 23 goals in their seven matches out in India, with Liverpool striker Rhian Brewster collecting the Golden Boot after scoring eight of them and Manchester City playmaker Phil Foden named Player of the Tournament.
After Sergio Gomez's brace had put the European champions in front (10th, 31st), Rhian Brewster (44th), Morgan Gibbs-White (58th) and Marc Guehi (84th) scored one apiece while Phil Foden - later adjudged the Golden Ball victor for his superb display - struck a brace (69th and 88th minutes) to pull off an incredible comeback.
Cooper said: 'We are worthy winners of the tournament, the football we've played and the amount of goals we've scored.
Pep confirmed that Foden would have played a part against Wolves in the Carabao Cup, but they chose to leave him in India at the World Cup, believing that to be better for his long-term development.
Earlier Brazil beat Mali 2-0 in the third-place playoff to earn a consolation after they lost to England in the semi-final.
"We just needed to stay calm and play our football".
"We're two great teams, but they were also superior to us physically". "This is doing our thing our way, and doing at the biggest stage is so rewarding".
"This trophy is a dedication to the good work done we have done in England, the developmental academies the dedicated work being put at the Football Association".
The 17-year-old, typically an attacking central midfielder, was pivotal to England's fightback in Kolkata playing in a more unfamiliar wider berth. We won the European Championship but only after drawing with them in the last minute.
The Young Lions faced an uphill struggle after a Sergio Gomez double put Spain in the ascendancy early on in Saturday's showpiece. "It will be exciting to see them go head to head on Saturday", he said. It gave us a bit of a boost. "We tried to defend him as a team, either with Juan [Miranda] or as a team, but he was better than us", he said. I always thought we were in control of the game even when we were 2-0 down.
England took that momentum into the second half and were back level on 58 minutes when Gibbs-White found space in the box and thundered Sessegnon's cutback into the net. Late goals from Guehi and Foden alleviated a nervy finale and ensured an emphatic final scoreline.
Guardiola said: "He asked me because we had the opportunity for him to stay here with us and maybe play against Wolves (in the Carabao Cup)".