1 (16 oz.) pkg. semi-sweet chocolate chips
1/2 c. butter
1 1/2 c. flour
1 c. sugar
1/2 tsp. baking powder
1/2 tsp. vanilla
1/4 tsp. salt
2 eggs
2 c. miniature marshmallows
1 c. chopped nuts

Heat 1/2 cup chocolate chips and butter over low heat until melted; cool. Heat oven to 375 degrees. Mix flour, sugar, baking powder, vanilla, salt, eggs and chocolate syrup in 9x9 inch pan. Bake 15 minutes. Sprinkle with marshmallows, nuts and remaining chocolate chips. Bake until marshmallows are golden brown, 15-20 minutes. Cool completely.