Sonho de valsa

Instructions

1. Cook the condensed milk in a saucepan over low heat, stirring constantly for 10 minutes, until it becomes a thick caramel that pulls away from the sides.
2. Off the heat, add the butter and the crumbled biscuits, then mix until you have a smooth dough.
3. Let it cool completely, then shape it into small balls about 2 cm across between your hands.
4. Chill the balls in the fridge for 30 minutes so they firm up.
5. Melt the dark chocolate with the milk and cream, either in a bain-marie or in the microwave, then stir in a little oil to make it more fluid.
6. Dip each ball into the chocolate with a fork, let the excess drip off, then place it on baking paper. Let it set in a cool place before serving.