Chili oil be used. Other spices may be included such as Sichuan pepper, garlic, or paprika. Commercial preparations may include other kinds of oil, water, dried garlic, soy sauce, and sugar. Recipes targeted to Western cooks also suggest other popular oils such as rapeseed, grapeseed or peanut, and any dried or fresh chili peppers. The solids typically settle to the bottom of the container in which it is stored. When using chili oil, the cook or diner may choose how much of the solids to use; sometimes only the oil is used, without any solids. Chili oil is commercially available in glass
Goulash goulash is left to simmer. After cooking a while, garlic, whole or ground caraway seed, or soup vegetables like carrot, parsley root, peppers (green or bell pepper) and celery may be added. Other herbs and spices could also be added, especially chili pepper, bay leaf and thyme. Diced potatoes may be added, since they provide starch as they cook, which makes the goulash thicker and smoother. However, chili peppers and potatoes are post-16th century additions, unknown in the original recipe. A small amount of white wine or wine vinegar may also be added near the end of cooking to round