I found that difficult to believe. There were refrigerated ships [2] but I don't think flash freezing methods had been invented. The pie would be mushy, and ho

I found that difficult to believe. There were refrigerated ships [2] but I don't think flash freezing methods had been invented. The pie would be mushy, and how would it be transported from the port to the front line? The New York Tribune (18 May 1918, page 3 [1]) has an article describing a much more likely process: send the ingredients to the front line, and send cooks. Apples, flour, butter and sugar transport very easily. Eggs are fragile, but maybe they used dried egg, or maybe that wasn't a problem. > "When we got our affairs in tip top shape two American girls could cook 3,000 doughnuts a day and 150 pies." [1] https://www.loc.gov/resource/sn83030214/1918-05-18/ed-1/?sp=3&r=0.478,0.097,0.419,0.331,0 https://www.loc.gov/resource/sn83030214/1918-05-18/ed-1/?sp=... [2] https://en.wikipedia.org/wiki/Reefer_ship#Timeline https://en.wikipedia.org/wiki/Reefer_ship#Timeline