People have been making pepper jellies for a long time. Some claim they’re Southern in origin, with roots in Texas and an official Pepper Jelly Festival in Alabama. They vary widely in color (from green to golden to red), spiciness (from sweet to jalapeno to habanero), and texture (from smooth jelly to marmalade-like spreads flecked with pepper pieces). But to ensure they store well on the shelf and in the fridge, all contain a lot of vinegar and sugar.
Although many recipes focus on the heat of chilies, I prefer a sweet bell pepper base with just a bit of heat mixed in. Many pepper jelly recipes also use commercial pectin and distilled vinegar, both of which are neutral in flavor. I prefer the depth added by fruit pectins and vinegars, so as with other savory spreads, I turn to tart apples to help the jelly set. Fresh lemon adds even more flavor and pectin.
Learn to make Sweet Pepper Jelly and Italian Plum–Apple Chutney