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The Perfumer's Cookbook 1 is one of the many Key Items found throughout Elden Ring, found at the Perfumer's Ruins in the Altus Plateau.
The Perfumer'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:
This item can be found at the Perfumer's Ruins located on the far southwest of the Altus Plateau below Mt Gelmir, just to the north of the exit of the Ruin-Strewn Precipice.