Last night, feeling lazy, I stopped at the branch of A.G. Ferrari on Castro St. in between 17th & 18th in SF. Ferrari's is sort of an upscale Italian Grocery store. They have a lot of prepared foods, sauces, etc.
I got some meatloaf, a half-pint of some peppers stuffed w/ prosciutto & cheese, and a piece of the subject line's torta al cioccolato.
The torta was delicious! I believe the sign said it was flourless. It had a nice flake on the edges, a creamy/fudgy center, and a wonderful deep chocolate flavor. It was $2.99 for a fair-sized piece.
If there is an A.G. Ferrari near you, check it out!