1/2 lb. butter
2 1/2 scant c. flour
3/4 tsp. baking powder
1 c. brown sugar
1 egg yolk
1 tsp. vanilla
1 egg white
1 c. crushed nuts

Mix all but nuts and white of egg. Divide into 2 parts. Pat flat on ungreased cookie sheet. Roll this with rolling pin. Cut away edges so it will be straight. Brush on lightly beaten white of egg. Spread crushed nuts on. Then bake 12 to 15 minutes at 350 degrees. Let stand a few minutes and cut into squares.