When a certain combination of herbs or spices is called for in many different recipes (or in one recipe that is used frequently), it is convenient to blend these ingredients beforehand. Blends such as chili powder, curry powder, herbes de Provence, garlic salt, and other seasoned salts are traditionally sold pre-made by grocers, and sometimes baking blends such as pumpkin pie spice are also available. These spice mixes are also easily made by the home cook for later use.