Melt the chocolate and butter using the “bain-marie” method. Using electrical mixer whip the eggs and sugar for 10 minutes until fluffy, then add the NESTLÉ Sweetened Condensed Milk and combine. After that, add the melted chocolate and butter, and mix.
Add the flour, mix gently and keep the mixture in the fridge for 15 minutes. Using a brush, grease the aluminum cups with the sugar and butter; pour the mixture to fill up to ¾ of each cup, and then put them in the freezer for at least 30 minutes.
Just before serving the fondant, remove the cups from the freezer and bake in a preheated oven at 220 °C for 12-15 minutes. Remove from the oven, turn the cups upside down on a serving dish and serve hot.