1. Preheat the oven to 350°F.

2. Melt the chocolate in a saucepan over a double boiler. Add the butter and mix until the butter is incorporated.

3. In a bowl, whisk the eggs and sugar until the mixture is white. Add the melted chocolate and mix. Add the flour, coffee, and baking powder.

4. Grease the mold and fill it.

5. Bake for 15 minutes.

6. Remove from the oven and let cool on a rack.

7. In a bowl, whisk the peanut butter with a fork to make it creamier. Spread the peanut butter on the cake and refrigerate.

8. Slice and serve.