Wash peppers. Add the peppers to a food processor and pulse them until they are finely chopped.
Combine the chopped peppers, sugar, vinegar, lemon juice, salt in a large saucepan. Stir until the sugar starts to dissolve.
Bring the mixture to a boil over medium heat, stirring occasionally to avoid sticking. Once it reaches a boil, lower the heat and let it simmer for about 10-15 minutes.
Return heat to high and bring the mixture to a rolling boil. Stir in the liquid pectin and let the mixture cook for another 1-2 minutes, stirring constantly. For powdered pectin, follow the package instructions for how to incorporate it into the hot mixture.
To test if the jelly is ready, dip a spoon into the jelly and hold it over a plate. If the mixture slowly thickens and coats the spoon, it’s ready to go. If it’s still too runny, let it simmer for a few more minutes, but be cautious not to overcook it.
Carefully ladle the hot jelly into sterilized jars. Leave about a ¼-inch of space at the top. Cover jars with lids.
Process the jars in a boiling water bath for 10 minutes.
Remove jars, place on a thick towel or a wire rack and let cool overnight.
To store, place in a cool, dark place for up to a year. Once opened store in the refrigerator for several weeks.
Enjoy!