Forest debutant Jorge Grant put his side in front just after the hour mark but substitute Ryan Mason responded with a stunning equalizer from 25 yards out, on only his fifth senior appearance in our colours.
Roberto Soldado and Harry Kane then wrapped up a 3-1 win.
Spurs: Vorm, Naughton, Fazio, Vertonghen, Davies, Bentaleb, Stambouli (Mason 65), Lennon, Paulinho (Kane 65), Townsend, Soldado (Lamela 85). Substitutes (not used): Friedel, Dier, Chiriches, Eriksen.
Forest: De Vries, Harding, Lascelles, Wilson, Fox, Paterson, Grant (Burke 87), Osborn, Vaughan (Tesche 46), McLaughlin, Veldwijk (Blackstock 74). Substitutes (not used): Darlow, Collins, Halford, Walker.
Goals: Spurs – Mason 72, Soldado 83, Kane 91; Forest – Grant 61.
Referee: Mr A Marriner.