According to Official Guinness Records,
The greatest number of layers in a layer cake is 260, and was achieved by The Watkins Co. (USA) in Winona, Minnesota, USA, on 14 September 2018.This record was attempted at an event celebrating the company's 150th anniversary.The final cake weighed 1,250 lbs, measured 6 ft 1 in tall, was 32 in wide by 24 in long at its base, and resulted in more than 5,000 individual servings. It was served to members of the community as well as donated to local businesses and charitable organizations.The cake was made using the same recipes and techniques as those for a traditionally-sized vanilla buttercream layer cake, but was prepared with a total of 900 eggs, 480 lbs of sugar, 150 lbs of flour, 102 lbs shortening, 45 lbs butter, 32 lbs oil, 45 lbs milk, 30 lbs water, 2.5 lbs salt, and 7 lbs of Watkins All Natural Baking Vanilla Extract.The cake was baked by Wuollet Bakery in Minneapolis, and took a team of 10 bakers more than 145 man hours to complete. The members of the baking team were Doug Wuollet, David Wuollet, Segundo Torres, Cristian Garcia, Sergio Valderaz, Brittany Byykkonen, Mike Jurmu, Audrey Malone, Gabino Barrera, and Alfredo Armenta.
For a complete list of 2018 records, please visit 2018 Guinness Records in United States.