1 c. butter
1/2 c. sugar
1 egg yolk
1/2 tsp. vanilla
1 1/2 c. sifted flour
1/2 c. crushed potato chips
1/2 c. nuts

Cream first 4 ingredients; add dry ones and shape into small balls. Dip fork into sugar and press cookies. Bake at 350 degrees for 8-10 minutes.