Ammonium aluminum sulphate
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Pickling recipes sometimes call for alum to give pickles extra crunch.
Also known as
- Alum
- Aluminum potassium sulfate
- Potassium aluminum phosphate
Substitutes
If using alum to firm pickles, consider omitting. For more information, see the Alum page of the Illinois Cooperative Extension Service. OR grape leaves (for making pickles)
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