Break the dark chocolate into pieces and set it aside in a bowl.

In a saucepan, warm the milk and cream together over low heat.

Add the sugar, stirring continuously until it dissolves.

Note: Low and slow is the key here. High heat can scald the milk, affecting the flavor.

Pour the hot cream mixture over the chocolate pieces.

Let it sit for a minute, then whisk until smooth.

If the mixture looks a bit grainy, keep whisking! It will come together with a bit of patience.

Add in the vanilla extract and butter, stirring until the butter melts completely.

Give it a taste—rich, isn’t it? Adjust sugar if needed.

Warning: Don’t add too much vanilla, or it can overpower the chocolate!