Dive into the delicious world of homemade bliss with this easy blackberry jam recipe! Made with fresh blackberries, sugar, lemon juice, and fruit pectin, it's the perfect spread for your morning toast or as a sweet gift. In just 40 minutes, you can enjoy the rich flavor and vibrant color of this delightful jam. Plus, learn tips for ensuring your jars seal perfectly. Preserve the taste of summer all year long!
4 cups fresh blackberries
2 cups granulated sugar
1/4 cup fresh lemon juice
1 package (1.75 ounces) fruit pectin (such as Sure-Jell)
1/2 teaspoon unsalted butter (optional, to reduce foam)