The Cannaries played one 45-minute half against two German opposition, Sparta Gottingen and RSV Gottingen and won both matches 4-0, following on from their seven-goal win over Ridgeons on Saturday.
James Vaughan struck his first goals for the club in the opening half, followed by Simeon Jackson, whose headed goal against Portsmouth earned Norwich promotion from The Npower Championship, and George Francombe strikes.
Several changes followed for the second period, and it was the turn of Steve Morison to notch his first City goal which was preceded by Elliott Bennett and Elliott Ward's double.
And Lambert was thrilled to secure another thumping friendly win.
"I'm pleased. The lads have worked really hard. It's a game for us to try and work on fitness.
"I think at this stage you've got to try to do the right things, it doesn't matter about the class of opposition you're against.
"I'm happy with the way things are going, the lads have worked really hard and as I said I couldn't be more happy with the way they're training. That's all you want."
Lambert's men will travel back from Germany in time to face five more friendlies before the season kicks off.
Visits to Crystal Palace, Southend United and Coventry City and followed by home games against La Liga duo Real Zaragoza and Parma.