3/4 c. butter
1/2 c. brown sugar
1 egg yolk
1 1/2 c. flour
1/4 tsp. salt

Cream together butter, brown sugar and egg yolk; add flour and salt. Shape into 1 inch balls and dip in slightly beaten egg white, then roll in 1 cup finely chopped pecans. With thumb press hole in each ball. Melt 1 cup chocolate chips and put a teaspoon in the hole in center of cookie.

Bake at 350°F for 12-15 minutes.