The academy graduate has impressed many since his debut last season, but he thinks he can still improve in one key area.
The 18-year-old has yet to score in the Championship for United despite playing 54 games since his debut at the start of last season - his only senior goal came in the Capital One Cup defeat to Doncaster Rovers at the start of this campaign. And he explained to Sky Sports that being more ruthless in front of goal is certainly an aspect of his game that he needs to work on.
"Scoring more goals improves you as a player a lot. I had a chance on Saturday [against Charlton] to score, but unfortunately it got blocked," he said.
"If I can score more then it's more I can add to my game and improve me as a player."
Along with the other academy graduates that have been given their chance by various managers in recent times, Cook's emergence into the first-team has been one of the brightest points at Elland Road lately.
Despite his tender age, the England under-19 international has already developed into a stalwart of the side who is often dictating the tempo with which Steve Evans' men play. His passing and dribbling ability in particular will surely see Leeds fans cross everything in the hope that each transfer window passes without their key man being snatched away.
But if he can add goals to his game in time it is going to become even harder for Leeds to hold onto the youngster.