First, line an 8 X 8-inch pan with parchment paper and set aside.

Pour sweet condensed milk in a large dish and warm it, at medium heat, stirring it from time to time.

After that add chocolate and butter before the milk starts to boil, then stir until chocolate is completely melted.

Remove from heat and fold in vanilla and pistachios and cranberries, too.

Pour the mixture into the pan and make it smooth. Finally, put it in the fridge for at least 2 hours.

Before serving, it should be taken out of the fridge and left at a room temperature for few minutes.

The fudge should be cut into 36 pieces.