Gather all ingredients on a clean workspace.
In a small saucepan, combine the heavy cream and butter.
Heat the mixture over medium heat until it begins to simmer.
Remove the saucepan from heat once the butter is melted.
Add in the dark chocolate chips, stirring until fully melted.
Incorporate the vanilla extract and a pinch of salt.
Continue stirring until the sauce is smooth and glossy.
If the sauce is too thick, add a splash more cream to reach desired consistency.
Allow the sauce to cool slightly before serving.
Store any leftovers in an airtight container in the fridge.