Combine the remaining 1/4 cup sugar with 2T cornstarch in a small bowl. I keep some vanilla sugar on hand so I used it for the remaining 1/4 cup. Turn the heat to medium-high, add the mixture and stir until the mixture thickens. About 1-2 minutes. If you think you have too much liquid, you can pour a little off. You will be able to leave streaks through the mixture when it’s thick enough.