1 c. butter
1 egg, separated
2 c. flour
1 c. sugar
1 tsp. vanilla
1 c. chopped nuts

Cream butter and sugar. Blend in egg yolk, vanilla and flour. Stir in 1/2 cup nuts. Spread dough evenly in lightly greased 15 x 10 inch pan. Beat egg white until frothy and brush over dough. Sprinkle with remaining 1/2 cup nuts. Bake in 350 degree oven for 25-30 minutes. Cool and cut into squares.