1 c. butter
1 c. sugar
1 egg yolk
2 c. flour
1 tsp. vanilla
1/2 tsp. baking powder
1 lg. chocolate bar
1/2 c. chopped pecans

Preheat oven to 350 degrees. Cream together butter and sugar. Add egg yolk, vanilla, flour and baking powder and mix. Spread on large cookie sheet. Bake 20 minutes or until lightly brown. Top with chocolate bar and spread as it melts. Top with nuts.