"Egg coffee (ca phe trung or cà phê trứng) emerges as a beacon of innovation amidst wartime scarcity. In the 1940s, as sugar and milk prices soared, Mr. Giang, the founder of Giang Cafe in Hanoi, turned to egg yolks, inspired by his experiences at the Metropole Hotel (presently Sofitel Legend Metropole Hanoi) and the allure of cappuccino." - Lana Tran