The Gudetama cookbook is available via bookstores (physical and digital) in Japan, as well as on websites like Amazon.
In promotional material for the Gudetama cookbook, Sanrio assures readers that the cookbook lacks motivation as well. This isn’t just a reference to how Gudetama spends all day lazing around.
The name of the recipe book is “Gudetama’s No Egg No Life: If you have eggs, you can relax.”
Sanrio will release a cookbook in which Gudetama will teach you all the different ways to cook eggs.