Michu bagged a brace with Jonjo Shelvey, Angel Rangel, Nathan Dyer, Pablo Hernandez and Kenji Gorre also on target as Michael Laudrup's men bagged five goals in either half.
The Premier League side conclude their Dutch tour with a meeting with ADO Den Haag this weekend after three victories from their three fixtures so far.
Leon Britton, who featured in the first half against Haaglandia, knows the Eredivisie side will provide much sterner opposition.
He told the club's official website: "Scoring ten goals is a good thing. The majority of us got 45 minutes under our belts, so it was a good exercise in terms of fitness.
"It's nice for the lads at the top end of the pitch to get on the scoresheet. We are all really pleased to see Rory come on and get a hat-trick.
"The tour has been good for us. It's good to come away on tour - it allows the new players to bed in. It's a lot of training and games, so it's ensuring we are ready for the start of the season.
"But Saturday will be a bigger test for us and it's a good way to end our time here. They are in the top division, so it we will face our toughest game of the tour.
"We have a good relationship with Den Haag. They are in the top division, so it will be a much sterner test than what we have had so far.
"But we need that step up in opposition because the Europa League is only a few weeks away, and we need to be ready."