Combine cornstarch, garlic powder, bouillon granules, and onion powder. Use a whisk to stir in vinegar, 6 tablespoons water and ginger until cornstarch is dissolved. Stir in soy sauce, corn syrup and 2 2/3 cups water.
Pour into a 5 cup container. Store in refrigerator and use withiin 4 weeks. Stir well before using.
