The Dons are due also due to face Malahide United and Shelbourne during their week-long trip and got off to the perfect start at the UCD Bowl.
An early strike from Josh Magennis set the Scottish Premier League side on their way before Jonny Hayes added a second on the half-hour mark.
Niall McGinn struck for the Reds - who included former Scotland cap Barry Robson but not new signing Nicky Weaver - just after the break while Peter Pawlett wrapped up a convincing victory with a goal three minutes from time.
Ross County, meanwhile, also secured a 4-0 triumph as they saw off Highland League outfit Nairn County at Station Park.
New Dutch strikers Kevin Luckassen and Darren Maatsen netted either side of goals from Ivan Sproule and Steven Ross, while the Staggies also fielded fellow new recruits Ben Gordon, Steven Saunders and Marc Klok.
Also, ex-Dundee United and Aberdeen midfielder Mark Kerr and David Louhoungou - formerly of Hamilton - were among five trialists who turned out for Partick Thistle in their 0-0 draw with Livingston at the Energy Assets Arena.