In a small pot over medium heat, heat the milk, cream, vanilla extract and salt until very hot and steamy. When you see bubbles, turn the heat to low and stir in the chocolate, stirring occasionally, until melted.
1 cup (236 ml) whole milk, 1/3 cup (78 ml) heavy cream, 1 teaspoon vanilla extract, pinch of salt, 1 cup (170 grams) semi-sweet chocolate