They are made with red pepper, rice, sundried tomato pesto and split peas surrounded by breadcrumbs and have been accredited by The Vegan Society.
The full meal will come with fries, which are already vegan, and a soft drink.
Thomas O'Neill, head of food marketing at McDonald's UK & Ireland, said: "In the last 12 months we've seen an 80% uplift in customers ordering vegetarian options at McDonald's, so it is time for the brand famous for the dippable McNugget to launch a dippable option for our vegetarian, vegan and flexitarian customers.
"The Veggie Dippers are a delicious addition to our menu and we're looking forward to seeing what customers make of our first vegan Extra Value Meal and Happy Meal in the new year."
The Veggie Dipper meal with four dippers is £4.99 or £2.99 for the Happy Meal size, with two dippers. Four Veggie Dippers can also be bought separately for £3.29.