Food & Cooking Recipes Healthy Recipes Gluten-Free Recipes Basic Jam By Martha Stewart Editors Martha Stewart Editors Facebook Instagram Twitter Website An article attributed to "Martha Stewart Editors" indicates when several writers and editors have contributed to an article over the years. These collaborations allow us to provide you with the most accurate, up-to-date, and comprehensive information available.The Martha Stewart team aims to teach and inspire readers daily with tested-until-perfected recipes, creative DIY projects, and elevated home and entertaining ideas. They are experts in their fields who research, create, and test the best ways to help readers design the life they want. The joy is in the doing. Editorial Guidelines Updated on May 16, 2017 Print Share Share Tweet Pin Email Photo: Christopher Testani Prep Time: 20 mins Total Time: 45 mins Yield: 5 cups The skins from stone fruit will contribute color and flavor to the jam. But for a smoother mixture, you can start by peeling peaches or nectarines: Carve an X in the bottom of each and plunge them into boiling water for 30 seconds, then transfer them to an ice-water bath to stop the cooking; the skins will slip off. For plums, just lift the skins out of the cooked jam with a fork. Ingredients 3 pounds fruit (see options, below), cut into 1-inch chunks if large, stone fruit pitted 1 ½ pounds sugar (3 ⅓ cups) Coarse salt 2 tablespoons fresh lemon juice Directions Stir together fruit, sugar, and 1/4 teaspoon salt in a large heavy-bottomed pot. Bring to a boil, stirring until sugar is dissolved and mashing fruit with a potato masher. Add lemon juice; continue to boil, stirring frequently, until bubbles slow, chunks of fruit show at top, and mixture clings to a spoon but falls off in clumps, 10 to 12 minutes. Skim foam from top. Ladle jam into clean containers, leaving 3/4 inch of headroom. Let cool completely. Cover, label, and refrigerate up to 1 month, or freeze up to 1 year. Variations Mixed Berry1 pound each raspberries, blackberries, and strawberriesNectarine-Raspberry2 1/4 pounds nectarines12 ounces raspberriesPeach3 pounds white or yellow peaches, peeled (optional)Peach-Plum1 1/2 pounds each peaches, peeled (optional), and plumsPlum3 pounds plumsRaspberry3 pounds raspberries Print