1 (12 oz.) pkg. semi-sweet chocolate chips
1/4 c. butter
2 c. biscuit baking mix
1 (14 oz.) can sweetened condensed milk
1 egg, beaten
1 tsp. vanilla extract
1 to 1 1/2 c. chopped nuts
Confectioners' sugar

Preheat oven to 350 degrees. In large saucepan over low heat, melt 1 cup chips with butter. Remove from heat. Add biscuit mix, sweetened condensed milk, egg and vanilla. Stir in nuts and remaining chips. Turn into well greased 13 x 9 inch pan. Bake 20 to 25 minutes or until brownies begin to pull away from sides of pan. Cool. Sprinkle with sugar.