01 -
Put on gloves. Rinse the jalapeños, trim off the stems, and slice into 1/4-inch rings. Remove some seeds and ribs if you want a milder batch.
02 -
Add brown sugar, apple cider vinegar, garlic powder, celery seed, mustard seed, turmeric, cumin seed, salt, and red pepper flakes to a medium saucepan. Bring to a simmer over medium heat and cook for 3 minutes, stirring often.
03 -
Add the jalapeño rings to the syrup. Simmer for 4-5 minutes, stirring gently, until the rings look glossy and slightly softened.
04 -
Use a slotted spoon to transfer the jalapeños into clean heatproof jars. Leave room for the syrup to cover the peppers completely.
05 -
Continue simmering the syrup for 8-10 minutes until it lightly coats a spoon. Do not reduce it to a thick candy syrup.
06 -
Pour the hot syrup over the jalapeños. Cool to room temperature, cover, and refrigerate for at least 3 days before serving.