- Wendy Sandner
- 31:16 hour(s):minute(s):second(s)
- United States (Spokane)
The longest marathon baking (individual) is 31 hr 16 min, and was achieved by Wendy Sandner (USA), in Spokane, Washington, USA, from 18 to 19 February 2022.
Wendy prepared over 2,500 cookies and donated all of the baked goods she made to local organizations.