Despite record production in Latin America, coffee is added to the list of items rationed during WWII. Its availability became limited due to increased demand from the military & civilians, and due to transportation ships being diverted to military use. Families were allocated one pound of coffee every 5 weeks. Roasted grains (called Postum) and even acorns were used to make coffee substitutes.
Coffee was released from rationing in July 1943, but sugar, which was the first food to be rationed back in 1942, remained on the ration list for five years, until 1947.