A summer transfer ban may have forced his hand but the boss has not been shy in picking players from the academy and the policy has mostly paid off.
Mason Mount, Tammy Abraham and Fikyao Tomori have all become regulars, while Reece James looks to be pushing Cesar Azpilicueta hard for the right-back spot.
All of these players have been nurtured through the academy, as has Guehi, who signed for the Blues before reaching secondary school.
The 19-year-old made his senior debut in September's 7-1 EFL Cup thrashing of Grimsby and Lampard again selected him in the competition for Wednesday's match against Manchester United.
Chelsea went down 2-1 following two goals from Marcus Rashford but Guehi acquitted himself well, although admitted his team could have done with a "bit more zeal" in their game.
With this season's EFL Cup over for the Londoners, chances could be few and far between for the youngster until his team enter the FA Cup in January.
The key for him now is to work hard in training and catch the eye of Lampard and his staff in the hope of earning a place in the Premier League XI.
Guehi is confident that will be the case, suggesting that the way the 41-year-old has been quick to throw in his kids makes him believe he will eventually get a chance.
"It is a great opportunity," he told the club website. "The manager has been giving young players a chance such as Fikayo, Tammy and Mason, and it really gives an incentive to us to go out there and try to prove a point.
"I was grateful for the opportunity again, and to go out and play against such a big club like Manchester United. Hopefully I can keep getting opportunities and keep showing everyone what I can do."