Peanut butter sauce is a very popular side dish and also an important ingredient in a number of Indonesian and Thai preparations. Peanut butter sauce recipes vary according to the region they are prepared in, but the essential ingredient is peanut paste, also referred to as peanut butter and soy sauce along with salt and spices. Peanut butter sauce has also been modified in the American cuisine to use it as a sweet sauce to pour on top of ice cream sundaes. The American peanut butter sauce is prepared using peanut butter, sugar and water and is used as a topping sauce for certain ice creams and sundaes. In Asia, Peanut butter sauce is also referred to as Satay sauce and it is an essential side dish to the very popular Chicken Satay.