I believe I've found an interesting recipe here. This one may very well be vintage from someone's family recipe book handed down through generations.
I tried to research this and only found one other recipe by the same name and it was nothing like this one.
Apparently this cookie was made and served only during Christmas. I could see it being served any time of the year.
1/4 C butter
1 1/2 C sifted flour
3 TBS granulated sugar
1 1/4 C brown sugar
3 eggs yolks, beaten ( save the whites)
1/2 C chopped pecans
1/2 tsp vanilla
3 egg whites ( the ones you saved) , stiffly beaten
1 C powdered sugar
Cream butter and granulated sugar
Gradually add flour
Press evenly into a 9"X13" pan
Bake at 350 degrees for 15 minutes
Fold in stiffly beaten egg whites
Spread evenly over baked layer
Bake an additional 25 minutes
Dust with powdered sugar
Cut into squares
Peace in the Kitchen!