The Mexican restaurant group’s new menu is available from 20 June and includes a wider range of plant-based options, as well as a DIY taco board straight from the trial site.
The Test Kitchen opened in November last year and sees diners rate and give feedback on new dishes using a digital "intelligent bill" on a smartphone.
Other new dishes include Mexican bowls - made with black beans, green rice, slaw, fresh salsas, crema and optional meat – and duck croquetas, a popular recent special that is now a permanent fixture.
Speaking to BigHospitality last year, Wahaca founders Thomasina Miers and Mark Selby said the Test Kitchen was part of a drive to reimagine the business as if it had launched in 2017/18.
“When we opened [in 2007] we were worried we had to dispel any preconceptions about Mexican food so felt like we had to be quite straight laced,” said Selby.
“From our point of view this is the start of Wahaca being really innovative."
Miers said the group was in a "new phase of creativity".
“Where we were once cautious about pushing the boundaries too much we are now excited about how much we can offer in terms of flavourful, healthy, vibrant food. We feel this is only the beginning," she said.