Mix in a saucepan 1 cup of bittersweet chocolate chips, 1/2 cup of sweetened condensed milk, and 1 tablespoon of butter or margarine. Heat over low heat until smooth. Add 3/4 cup of chopped nuts or hazelnuts and 1 teaspoon of vanilla extract. Mix well, remove from heat. Let cool slightly and use.
Mix in a saucepan 1 cup of bittersweet chocolate chips, 1/2 cup of sweetened condensed milk, and 1 tablespoon of butter or margarine. Heat over low heat until smooth. Add 3/4 cup of chopped nuts or hazelnuts and 1 teaspoon of vanilla extract. Mix well, remove from heat. Let cool slightly and use.