A small-batch strawberry rhubarb jam balancing sweet strawberries with the tartness of rhubarb. Simple, pantry-friendly, and perfect for toast, yogurt, or gifting.
Rinse strawberries, hull and chop. Trim rhubarb and cut into 1/2-inch pieces. Combine the fruit in a medium heavy-bottomed saucepan.
Toss fruit with sugar and let sit 20–30 minutes to draw juices for a brighter jam and reduced cooking time.
Add lemon juice and a pinch of salt. Heat over medium until simmering, then reduce to medium-low. Stir occasionally and simmer until fruit breaks down and mixture thickens, about 20–30 minutes.
Use the chilled-plate test to check the set. Stir in vanilla if using, skim any foam, and ladle into clean jars leaving 1/4-inch headspace. Refrigerate for short-term storage or process in a boiling water bath if canning for shelf storage.
Notes
For a firmer set, cook a little longer or use low-sugar pectin per package directions.
Refrigerate up to 3–4 weeks, or freeze up to 6 months.
Chilled-plate test helps avoid overcooking and preserves bright color.