Plums are the star of this easy jam recipe, providing rich, deep color and flavor. The texture and consistency is perfect for spreading on a piece of toast or a biscuit. This is the perfect go-to recipe to use when plums are in peak season.
Combine plums, sugar, orange juice and salt in a large saucepan. Cook over medium heat, stirring occasionally, until the plums start to release their juices, about 5 minutes. Increase heat to medium-high and cook, stirring occasionally, until thickened (or until a candy thermometer registers 220 degrees F), 20 to 25 minutes. Remove from heat.
Using a potato masher, mash the mixture to the desired consistency. Let cool completely, about 1 hour. Divide the jam between two 8-ounce jars. Use immediately, or cover and refrigerate for up to 3 weeks.
To make ahead: Cover and refrigerate for up to 3 weeks.
I love that this simple and delicious jam doesn't have to be canned--just stick it in the fridge and enjoy!