Chop the Peppers: Finely chop the bell pepper using a knife or a food processor. Place the diced peppers in paper towels and squeeze out the excess moisture to help the jelly set. Measure 1 ½ cups of loosely packed diced bell pepper.
Prepare the Jalapeños: Finely dice the jalapeños and squeeze out any extra liquid the same way. It’s a good idea to wear gloves when handling this many hot peppers.
Cook the Mixture: Place all the diced peppers into a large, deep pot. Add the sugar, vinegar, lemon juice, black pepper, and salt. Bring to a boil, stirring frequently. Lower the heat slightly to maintain a gentle boil, and cook for 10 minutes.
Add Pectin: Gradually stir in the liquid pectin while the mixture is boiling, and let it continue to boil for one more minute. Remove from heat and let it cool for about 5 minutes. Stir well to distribute the pepper pieces evenly.
Fill the Containers: Pour the jelly into your containers and secure the lids tightly.
Optional Step: Flip the containers upside down for about 30 minutes. This helps prevent the pepper pieces from floating to the top. Afterward, turn them right side up and let them cool at room temperature for 24 hours.
Storage: Refrigerate the jalapeño jelly and enjoy it within 10 days, or freeze it for up to 4 months.
Canning Option: If you want to can the jelly, pour it into sterilized jars. Wipe the rims clean, and secure the lids and rings (make sure they’re washed in warm soapy water). Process the jars in a water bath canner for 10 minutes (or longer if you’re at a higher altitude). Let the jars sit at room temperature for 24 hours, then store them in a cool, dry place for 6-10 months.
Serving Suggestions: Enjoy this jalapeño jelly over cream cheese with crackers, as a glaze for cauliflower wings, slathered on veggie burgers, or spread on sandwiches for an extra kick of flavor.