Preheat the oven to 210 ° C. Chop the chocolate. Add the butter to the choclate, then let it melt in a Pan.
Reserve the mixture. Mix the eggs with the sugar and ad it to the chocolate-butter mixture, the salt, the flour and cocoa.
Distribute the preparation in the molds, place them on a plate, then bake for 9 minutes. Serve the fondants out of the oven.