3/4 c. butter
3/4 c. sugar (scant)
1 egg yolk
3/4 c. crushed pringles
1/2 c. chopped pecans
1 1/2 c. flour (scant)
1 tsp. vanilla

Mix above. Add chips last. Make small balls, press flat with glass dipped in sugar. Bake at 350 degrees for 10 minutes.