Ingredients
Equipment
Method
- Sterilize jars in simmering water; keep hot until ready to fill
- Peel, pit, and chop peaches; toss with lemon juice to prevent browning
- Crush peaches with a potato masher to make about 4 cups
- Combine crushed peaches and lemon juice in a large pot; stir in pectin (and butter, if using)
- Bring to a full rolling boil over high heat, stirring constantly
- Add all the sugar at once; stir until dissolved
- Return to a full rolling boil and boil hard for exactly 1 minute, stirring constantly
- Remove from heat and skim off foam
- Test for set using the chilled plate method
- Ladle hot jam into jars, leaving 1/4 inch headspace
- Wipe rims, seal with lids, and process in a boiling water bath for 5 to 10 minutes (or cool and refrigerate/freeze if not canning)
Notes
Use ripe, fragrant peaches for the best flavor. Do not reduce the sugar without switching to a low or no sugar pectin, or the jam may not set. Two smaller batches set more reliably than one doubled batch. Properly sealed jars keep in the pantry up to a year; once opened, refrigerate and use within 3 weeks.
