3 Cups of semisweet chocolate
1 (14 ounce) can sweetened condensed milk
1/4 cup butter cut up in chunks
1 Cup chopped walnuts (optional)
1. Place chocolate chips, sweetened condensed milk, and butter in large microwaveable bowl. Cook in microwave till chips are melted, about 1-3 minutes, stirring once or twice during cooking. Stir in nuts, if desired.
2. Pour into well-greased 8x8 inch glass baking dish.(I used Butter Pam baking spray), Refrigerate until set (hard).
Then, cut into slices when hard.