Still, I hadn't made a cake for a while and wanted to test my baking muscles. Browsing through Cooking with Les Dames D'Escoffier, I found a winner. Shirley Corriher, biochemist and cookbook writer, and her update on a Pillsbury classic, the Tunnel of Fudge Cake. A runner-up in the Bake-Off contest in the 1960s, this recipe helped popularize the bundt pan and developed a cult following. A simple chocolate cake with walnuts, its secret is an inner ring of fudge within the baked cake. This was originally achieved with a Pillsbury frosting mix, now discontinued, but Corriher re-worked the recipe without. Published in the NYTimes Science section, it is extremely detailed and Corriher explains exactly why it works. All baking demands precision, but I was careful to follow to the seemingly minute detail (natural cocoa, as she insists the more commonly found Dutch-processed will cause the cake to fail). She explains it much better than I could, so I am linking to her recipe and the accompanying article.
I was a bit nervous about the tunnel effect and the consistency of the cake-you can't check for doneness with a thermometer, but rather must trust your oven temperature's accuracy, or use an oven thermometer if you lack this trust. All in all, the cake was a huge success and great for chocolate lovers. I will definitely be making it again.