Place a large bowl of ice water next to the stove. Bring a large pot of water to a boil in a large pot. Add half of the jalapeños, cover, return to a boil and cook for 2 minutes. Use a slotted spoon to transfer the jalapeños to the ice water to cool. Repeat with the remaining jalapeños. Drain the cooled jalapeños and divide among 6 pint-size (2-cup) canning jars or similar-size tempered-glass or heatproof-plastic containers with lids.Advertisement
Combine vinegar, 3 cups water, salt and sugar in a large saucepan. Bring to a boil and stir until the salt and sugar dissolve. Boil for 2 minutes. Remove from the heat.
Carefully fill jars (or containers) with brine to within 1/2 inch of the rim, covering the jalapeños completely. (Discard any leftover brine.)
Place the lids on the jars (or containers). Refrigerate for at least 24 hours before serving. Store in the refrigerator for up to 1 month.
Make Ahead Tip: Cover and refrigerate for up to 1 month.
Equipment: 6 pint-size (2-cup) canning jars or similar-size tempered-glass or heatproof-plastic containers with lids