Add soy sauce, Worcestershire sauce, chile sauce, vinegar, sugar, cornstarch, and water and whisk along with the pepper powder.
3 tbsp Soy Sauce, 2 to 3 tbsp Worcestershire sauce, 1 tsp Chilli sauce, 1 tbsp Apple cider vinegar, 2 tsp Sugar, 1 tbsp Cornstarch or All purpose flour, ½ cup Water