1 can evaporated milk
2 cups sugar
3 ounces semi sweet chocolate (Bakers chocolate 1 oz squares)
1 cube butter
1 teaspoon vanilla
Put evaporated milk, sugar and chocolate into a medium saucepan. Cook on medium heat and bring to a boil stirring constantly. Once it starts to boil, reduce the heat and simmer for 15 minutes, while stirring constantly. Take off the heat and add butter and vanilla. Whisk together and serve.