1. Preheat the oven to 350°F.2. Melt the chocolate and butter in a bain-marie.3. Remove from heat and let cool to room temperature.4. Add the sugar, eggs, and salt. Then add the flour and mix.5. Pour into the mold and bake for 15 minutes.6. Let rest for 5 minutes in the turned-off oven.7. Remove from the oven and let cool to room temperature. Refrigerate for 1 hour.8. Remove from the refrigerator, unmold, cut into individual pieces, and serve.