According to Official Guinness Records,
The largest audience for a cooking show consists of 6,512 participants, achieved by Steffen Henssler (Germany) at Festhalle, in Frankfurt, Germany, on 12 May 2018.The record was achieved on the last date of Steffen Henssler's 2018 live cooking show tour.
For a complete list of 2018 records, please visit 2018 Guinness Records in Germany.