Combine the Hoisin Sauce (1/4 cup), Distilled White Vinegar (1/4 cup), Granulated Sugar (1/4 cup), and Water (1/4 cup) in a saucepan and bring it to boil over medium-low heat.
Add Marmite® (1/4 teaspoon), Onion Powder (1/4 teaspoon), Garlic Powder (1/4 teaspoon), Ground Ginger (1/4 teaspoon), Ground Black Pepper (1/4 teaspoon), and Sesame Oil (1/4 teaspoon) in the saucepan.
Ladle out 1/4 cup of sauce to a small bowl, add in the Corn Starch (1 tablespoon) and mix well.
When the sauce starts to boil, add the cornstarch mixture back into the pan, cook for 5 minutes or until thickened. Keep stirring while cooking.
Transfer the sauce into a small bowl, set aside and let it cool down. And serve with chicken nuggets.