McDonald’s sweet n sour sauce original recipe Mcdonald’s Sweet ‘N’ Sour Sauce: 1/4 cup peach preserves 1/4 cup apricot preserves 2 tablespoons light corn syrup 2 tablespoons white vinegar 1 1/2 teaspoons cornstarch 1/2 teaspoon soy sauce 1/2 teaspoon yellow mustard 1/4 teaspoon salt 1/8 teaspoon garlic powder 2 tablespoons water