- 1/2 cup white sugar, or to taste
- 1/2 cup white vinegar, or more to taste
- 1/2 cup maraschino cherry juice
- 1/2 cup pineapple juice
- 1 1/2 tablespoons cornstarch
- 1/4 cup cold water
- Mix the sugar, vinegar, maraschino cherry juice, and pineapple juice in a saucepan over medium-low heat, stirring to dissolve the sugar.
- Place the cornstarch in a small bowl, and stir the water into it to make a smooth paste. Stir the cornstarch paste into the juice mixture, and bring to a simmer. Stir constantly until the mixture thickens, about 1 minute.