This is a serious dessert mousse, friends. A chocolate experience so rich, velvety and decadent, a few tablespoons is really all that any one person needs. I usually chuckle when I watch Mrs. Pastry eat chocolate bars, because she nibbles them like a mouse, savoring every tiny morsel. However even I — a man known to wolf chocolate bars down by the handful — eat this only incrementally, off the tip of a spoon.