To begin making a molten chocolate cake, a stick of butter and ten ounces of semi-sweet chocolate chips are added to a double boiler. Meanwhile in a stand mixer, four whole eggs plus one yolk are whisked together with one cup of sugar until it triples in volume. As this mixes, the insides of eight ramekins are lightly buttered and sugared to ensure the cakes do not stick. Now turn off the mixer and return to the double boiler where the chocolate should be melted into a smooth consistency. Add cinnamon and a teaspoon of vanilla extract to the chocolate, as well as a pinch of salt. Half the chocolate mixture is added at a time to the egg/sugar mixture and combined. Once combined, a small amount of flour is sifted over the top and folded into the mixture. The mixture is then distributed into the ramekins, baked, and dusted with powdered sugar before serving.