2 sticks unsalted butter
4 oz. unsweetened chocolate
1 tbsp. vanilla
1 c. chopped walnuts
2 c. sugar
4 eggs
1 1/2 c. flour
1 (16 oz.) pkg. chocolate chips

Melt butter and chocolate in microwave, stir well, let cool 5 minutes. Add sugar, and eggs one at a time, beating well after each egg. Add vanilla and blend in flour. Mix well. Fold in chocolate chips and walnuts. Bake at 350 degrees for 30 minutes (do not overbake). Cool. Place in refrigerator - serve cold.