Total time: 10 minutes
Yield: 1 cup of jam
- 3/4 cup blackberries
- 3/4 cup raspberries
- 1 tablespoon cornstarch
- Place berries in a small saucepan over medium heat and stir slowly but constantly.
- When the raspberries have broken down into liquid, sprinkle in the cornstarch. Stir quickly to prevent clumping. (Sorry for the terrible photo; my camera was struggling with the steam.)
- Continue stirring until the blackberries have broken down and the liquid has begun to thicken. (Taste it here. If you want to add sugar, do it now and continue to heat and stir until dissolved.)
- Pour jam into a jar and refrigerate. It will continue to thicken as it cools.