Use this recipe for our Individual Chocolate-Espresso Charlottes.
Bring chocolate, sugar, coffee, corn syrup, and salt to a boil in a saucepan, stirring to melt chocolate. Reduce heat, and simmer, stirring occasionally, until thickened, about 5 minutes. Remove from heat, and stir in butter. Let cool, stirring occasionally, until barely warm but still pourable, about 20 minutes. Use immediately.