01 -
Peel and pit the peaches, then finely chop the flesh. Wash the jalapeño peppers, remove the seeds for a milder flavor, and finely chop.
02 -
In a large saucepan, combine the prepared peaches, jalapeños, lemon zest, and lemon juice. Stir together over medium-high heat and bring the mixture to a gentle boil.
03 -
Once the mixture reaches a full boil, stir in all of the granulated sugar. Continue stirring to fully dissolve sugar, maintaining a rolling boil. Cook for 15–20 minutes, stirring frequently, until the mixture reaches a thick, jam-like consistency.
04 -
Dip a metal spoon into the mixture. The jam is ready if it coats the back of the spoon without dripping off rapidly.
05 -
Wash jars in hot soapy water and dry thoroughly. Pour the hot jam into the jars, leaving a 0.5 cm space at the top. Wipe rims with a damp kitchen towel, seal with lids, and allow jars to cool to room temperature.