TWO goals in two minutes midway through the first half from Marcus Maddison and Adam Campbell set up an FA Premier Academy League double for the Magpies over Middlesbrough.
Will Turton increased the lead after the break to put the game beyond Boro, whose only response was a late Adam Reach goal.
Remi Streete had an early header cleared off the line from a Miele corner before United took a stranglehold on the game.
A well-constructed move was finished off by Maddison, who claimed his sixth goal in the last four games, and it was quickly two.
Campbell raced on to a long clearance to get the better of the Boro defence to fire past exposed goalkeeper Jake Johnson and claim his first goal for the under-18s.
Dan Taylor almost made it three on the half-hour when he fired across goal and beyond the post, Maddison the architect.
Newcastle could not find the killer third goal, though, and Robinson had to save with his legs from Wilson Kneeshaw before Johnson denied Taylor at the other end.
However, it was all over for Boro 13 minutes from time when Turton cut inside to beat Johnson, his first academy goal the catalyst for a belated Boro revival.
Charlie White struck the woodwork and saw another effort cleared off the line.
The home side finally pulled a goal back on 89 minutes when Reach cut in from the left wing to shoot past Robinson.
NEWCASTLE UNITED UNDER-18s: Robinson; Turton, Riley, Storey, Streete, Maddison (McCorrigan 59), Miele, Nzuzi, Hoganson, Taylor (Evans 72, Campbell. Subs: (not used) Mitchell, Toland, Spear.
MIDDLESBROUGH UNDER-18s: Johnson; Galpin, Bennett (Reach 65), Waters (White 65), Oliver, Sirrell, Fowler, Edwards, Kneeshaw, Roberts (Brobbel 75), Andrew.