Add the chocolate, sweetened condensed milk, vanilla extract, beer and salt to the top of a double boiler (or a metal bowl set over a pot of gently simmering water).

Stir over medium-low heat (make sure the water does not boil) until most of the chocolate has melted. Remove from heat, continue to stir until all the chocolate has melted.

Pour into silicone molds, chill until set.