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The Nomadic Warrior's Cookbook 1 is one of the many Key Items found throughout Elden Ring, sold by Merchant Kale in West Limgrave.
The Nomadic Warrior's Cookbook 1 is a Key Item Recipe Book that will unlock extra crafting recipes once you have obtained it.
This includes the following recipes:
Purchased From: Merchant Kale at the Chuch of Elleh in Limgrave. It can be purchased for 500 Runes.