1 1/2 cups frozen raspberries 1 cup frozen blueberries 1/2 cup white sugar 1/4 cup water

Combine the raspberries, blueberries, sugar, and water in a small saucepan; bring to a boil and cook at a boil for 5 minutes, scraping the bottom as needed to keep from burning. Reduce heat to low; simmer the mixture until thick, about 10 minutes. Serve warm.