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Garlic and Onion Skin Ash

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Author: Gretchen


  • garlic skins
  • onion skins


  • Preheat the oven to 350 degrees Fahrenheit.
  • Arrange the garlic and onion skins on a baking sheet. Make sure you’re using only the outer, dried skins — not the next layer of onion that has some moisture still.
  • Bake the skins until very dark brown, about 30 minutes.
  • Transfer the skins into a food processor. Get your fingers damp and flick just a tiny bit of water into the food processor. (This will help keep the skins from just flying around inside.) Process until the skins are finely chopped.


Optional: for a finer mixture, sift through a sieve.