This mud cake is not a heavy cake but it is rich. So get the milk ready as a side. I know it sounds strange to say that it's not heavy but it isn't. The cake is really light in texture. It was so good that the Sous Chef had a second piece and you know the Sous Chef is not one for ooey gooey stuff (although he lied and said it was still his first piece - he "was just eating slow"). Chocolate Mud Cake (Adapted from JoePastry ) 8 oz butter (2 sticks) 8 oz semisweet chocolate 1 c flour 2 t instant espresso powder 1/2 c cocoa 1/2 t baking soda 1/4 t salt 2 c sugar 4 eggs 1/2 c buttermilk 1 t vanilla 1 t chocolate extract Grease a 9" springform pan. Line the bottom with a round of parchment. Combine the chocolate and butter in a microwave safe bowl. Melt them in the microwave stirring every 15 seconds or so. Stir until completely smooth. Sift and combine flour, cocoa, espresso, baking soda, and salt in a bowl. Stir in sugar. Whisk eggs and b...