The Seitan Pattie, which costs £2.99 for a pack of two, is available now.
The burger, which is primarily made from seitan, also features mushrooms for a 'smoky' flavor. It is suitable for both barbecuing and oven cooking.
Vegan seitan burger
"We are really excited to be launching the first seitan burger," Simona Cohen-Vida, Waitrose & Partners Vegetarian & Vegan Product Developer said.
"The modern barbecue is an inclusive affair with delicious products catering to all tastes and demands and we are thrilled to be able to offer a fantastic selection of vegan options."
Waitrose vegan products
The new burger joins Waitrose's burgeoning vegan offering. The supermarket launched a major plant-based product line last October.
The range, which offers more than 30 products, includes ready meals like pizza, vegan mac & cheese, and vegan fishcakes, as well as staples like mayo and tartar sauce.
"We are thrilled to be expanding our own-label vegan and vegetarian offering with such a wide range of dishes and ingredients," said Chloe Graves, Chilled Vegan & Vegetarian Buyer at Waitrose & Partners, said when the range launched.
"Our newest range is aimed to make eating delicious tasting vegetarian and vegan food even more simple and enjoyable!"
In addition to launching a vegan range last year, Waitrose also became the first UK supermarket to offer a dedicated vegan section in response to customer demand.
"Our current selection of products has been selling really well week after week, with requests for more choice coming from our customers and partners, so we could clearly see there was an appetite to have more vegetarian and vegan options in our shops," said buyer Chloe Graves said at the time.
"Increasing our range builds on the work we did last year to increase choice for our customers in this area. We are working with some fantastic exclusive brands to ensure our shoppers have a really unique selection of food to choose from."