Preheat your oven to 320°F (160°C). Place 6 ramekins (5 fl. oz - 150ml) capacity each into a baking pan.
Place the chocolate in a heatproof bowl and set aside.
In a saucepan add the milk and whipping cream and place over medium heat. Bring to a simmer and pour the hot mixture over the chocolate.
Let it for a minute and stir until the chocolate is melted and well combined.
In a separate bowl, whisk together the egg yolks, sugar, salt, vanilla extract, and instant coffee powder if used.
Gradually pour the chocolate mixture into the egg yolk mixture while stirring continuously.
Sieve the mixture for a smooth texture.
Divide the chocolate mixture evenly into the ramekins.
Pour hot water into the baking pan until halfway up the sides of the ramekins.
Bake for 30 minutes.
Let the pots de crème to cool and refrigerate them for at least 4 hours or overnight.
Before serving decorate as desired or serve as is. Enjoy!