Cadbury, alongside agency partner VCCP London, has put taste buds to the test with an integrated advertising campaign that purposefully ‘glitches’ to keep the new flavors under wraps – for now.

The Cadbury Creme Egg McFlurry has vanilla soft ... this in the states," he wrote in an Instagram post. What McFlurry flavors are available in the U.S.? McDonald's customers can still order ...