Panda Express Sweet and Sour Sauce: A staple in American Chinese cuisine and an original condiment served at Panda Express since 1983, our Sweet and Sour sauce is the go-to dipping sauce for egg rolls and other appetizers. The balance of the sweet and sour kicks the flavor up a notch in any dish! Cook up your protein of choice and vegetables with Panda's Sweet and Sour sauce for a delicious, easy meal.