Place the milk, granulated sugar, salt and 1 cup cream, in a saucepan over medium low heat and bring to a simmer, stirring constantly. Add the chocolate chips and the vanilla extract and continue stirring with a heatproof spatula until all the chocolate is melted. Remove from the heat.
Divide the chocolate mixture into 4 glasses (just a bit under the half line) or ramekins, pots, cover them with plastic wrap and refrigerate until set (for about 4 hours), if you want to serve them the same day. Chocolate pots are perfect as I usually make them a day ahead and keep them refrigerated.
Recipe adapted from Curtis Stone - Coles recipes