In a medium saucepan, combine the heavy cream, sugar, and butter over medium heat.
Stir the mixture until the butter melts completely.
Gradually add the cocoa powder, whisking constantly to avoid lumps.
Once smooth, add the chocolate chips.
Continue stirring until the chocolate is fully melted.
Add vanilla extract and a pinch of salt.
Let the sauce simmer for 2-3 minutes, stirring occasionally.
Remove from heat and let it cool slightly before serving.
If too thick, reheat gently with a splash of cream.
Serve warm over your favorite desserts.