[3] Fassnidge served as a judge on the Australian cooking show My Kitchen Rules from 2013 to 2021 in the Kitchen HQ cook off and final rounds from 2013 to 2019 alongside Liz Eagan, Karen Martini and Guy Grossi.
He Became a main series judge for the eleventh season in 2020, titled MKR: The Rivals alongside long running hosts/judges Manu Feildel and Pete Evans.
Fassnidge returned as a judge in the Kitchen HQ cook off and final rounds for the twelfth season in 2022, alongside Curtis Stone and Gary Mehigan.
[10] In March 2022, it was announced that Fassnidge is to host an Australian adaptation of Kitchen Nightmares on Channel 7.
[13] In January 2024, Seven Network announced that Fassnidge would be joining the home lifestyle program Better Homes and Gardens as a food presenter alongside Karen Martini after the departure of Ed Halmagyi.