The sign outside Sugar Bakery says, “Do you want to climb mousse mountain?” The answer: Yes, yes, you do. It’s dark chocolate cake with a just as rich chocolate mousse, which no doubt looks like a giant lump until they enrobe it all in bittersweet chocolate, adding little ridges and edible trees. Buy one and you can pretend you’re a hungry giant. Buy a dozen and you can pretend you’re a vengeful god.(Sugar Bakery + Cafe, 1014 Madison St., 749-4105)