Mystery Blue Deluxe Milkshake

Mystery Blue Deluxe Milkshake · app pricing (euros)

A blue milkshake flavoured with vanilla and candyfloss, finished with whipped cream and popping sprinkles. There's a plain 0.4 l version too, and the Finnish site doesn't describe either one as limited.

Image © McDonald's Finland, shown to identify the product. Price checked 2026-09-11; McDonald's Finland does not publish prices on its site; Finnish prices are in euros and vary by restaurant, and the McDonald's app shows yours.