Is the milk and cream used to make your milkshakes pasteurised? 21 April 2021 05:35 Yes. In the U.K. both the milk and the cream used in our milkshake base mix are pasteurised. Related articles Customer Service Are all the milkshakes suitable for vegetarians? Delivered or past orders How can McPlant™ be vegan if it states it may contain milk? Arriving at a restaurant