"Coffee substitutes are non-coffee products, usually without caffeine, that are used to imitate coffee. Coffee substitutes can be used for medical, economic and religious reasons, or ...
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simply because coffee is not readily available. Roasted grain beverages are common substitutes for coffee.
In World War II, acorns were used to make coffee, as were roasted chicory and grain. Postum, a bran and molasses beverage, also became a popular coffee substitute during this time. During the American Civil War coffee was also scarce in the South:
For the stimulating property to which both tea and coffee owe their chief value, there is unfortunately no substitute; the best we can do is to dilute the little stocks which still remain, and cheat the palate, if we cannot deceive the nerves." - (en.wikipedia.org 31.07.2021)
