1. Dissolve the coffee in boiling water. Set aside.
2. Boil the milk with sugar. Set aside.
3. In a bowl put the eggs and yolks; beat lightly. Mix with the reserved coffee and milk.
4. Grease a custard mold. Pour the mixture into the mold, reserving 1 cup. Cook in a 350ยบ oven, in a hot water bath, for 30 minutes or until set. Let cool and unmold onto a platter.
5. Add chocolate to the reserved mixture and cook without boiling, until thickened. Serve the custard with the chocolate cream.