Little French Fudge Cakes

Preheat the oven to 375°F. Butter a dark metal 6-cup cupcake tin.

Combine the broken-up bittersweet and unsweetened chocolates with the butter in a medium-sized microwave-safe bowl. Melt them for 2 to 3 minutes at medium-low power. Check by stirring, as chocolate holds its shape when microwaved. Or melt it in a heatproof bowl over simmering water.

In a medium to large bowl, whisk together the cinnamon, vanilla, eggs and yolk, sugar, and salt until creamy. Stir in the flour to blend thoroughly. Then stir in the chocolate/butter mixture until smooth. Finally, blend in the bite-sized pieces of chocolate. Pour the batter into the cupcake pan, filling each three-quarters full.

Bake the cupcakes for 18 minutes. Insert a knife into the center of a cupcake. It should come out with some streaks of thick batter. If you have any doubt about doneness, press the top of a cupcake to see if it is nearly firm. Remove them from the oven. Cool the cupcakes in the pan on a rack for 5 to 10 minutes to serve warm, or for 20 minutes to serve at room temperature.