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Instructions:
- Prepare a boiling water bath canner and sterilize 5 half-pint jars. Keep the jars hot until ready to fill.
- Wear disposable gloves when handling the serrano peppers. Wash all peppers, remove the stems and seeds, and roughly chop them.
- Place the chopped peppers into a blender or food processor. Add enough of the vinegar to help purée the peppers until completely smooth.
- Transfer the pepper purée and the remaining vinegar to a large saucepan.
- Bring the mixture to a boil and continue boiling for 10 minutes.
- Remove the pan from the heat and strain the mixture through a jelly bag or several layers of damp cheesecloth.
- Measure exactly 2¼ cups of the strained pepper-vinegar juice and return it to the saucepan.
- Stir in the granulated sugar until dissolved, then bring the mixture to a full rolling boil over high heat.
- Add the liquid pectin and boil hard for 1 minute, stirring constantly.
- Remove the saucepan from the heat and skim off any foam from the surface.
- Ladle the hot jelly into the prepared hot jars, leaving ¼-inch headspace.
- Wipe the jar rims clean, apply the lids and screw bands until fingertip tight, and process the jars in a boiling water bath:
- Half-pint jars: 5 minutes (0–1,000 feet)
- Adjust processing times according to your altitude if necessary.
- Carefully remove the jars and allow them to cool undisturbed for 12 to 24 hours. Verify that each lid has sealed properly before storing in a cool, dark place.
Variations
- Substitute red or orange bell peppers for a different color while maintaining the same quantity.
- Increase or decrease the amount of serrano peppers to customize the heat level without altering the tested proportions.
- Replace serranos with jalapeños for a milder pepper jelly.
- Add a pinch of crushed red pepper flakes after opening a jar if you prefer extra heat.
- Use the finished jelly as a glaze for roasted vegetables or baked ham for a sweet-and-savory finish.
Tips
- Wear gloves when handling hot peppers to protect your skin and avoid touching your face or eyes.
- Measure the strained pepper juice carefully to ensure the jelly sets properly.
- Bring the mixture to a full rolling boil before adding the liquid pectin for the best gel.
- Skimming the foam produces a clearer, more attractive finished jelly.
- Let the jars rest for 24 hours before checking the seals and moving them to storage.
- Label each jar with the canning date and store in a cool, dark pantry for the best quality.
- Once opened, refrigerate the jelly and use it within 1 month.