"Cornstarch or agar-agar are my preferred substitutes for gelatin," she ... your mousse with no thickener at all. If you've read our tips for making perfect chocolate mousse, you'll know that ...

Using the back of a metal spoon, spread the chocolate evenly inside six 31/2-inch foil muffin liners. Refrigerate until firm, about 30 minutes. To make the mousse: In a bowl, sprinkle the gelatin ...