1 (9 inch) unbaked pastry shell
1 c. (6 oz.) Hershey's semi-sweet chocolate chips
1/4 c. butter
1 (14 oz.) can condensed milk
1/2 c. biscuit baking mix
2 eggs
1 tsp. vanilla extract
1 c. chopped nuts

Preheat oven to 375 degrees. Bake pastry shell 10 minutes; remove from oven. Reduce oven to 325 degrees. In saucepan, over low heat melt chips with butter. In large mixer bowl beat chocolate mixture with remaining ingredients except nuts until smooth. Add nuts. Pour into pastry shell. Bake 35 to 45 minutes.