Ingredients:

1 ½ cup sweet cream butter
¾ cup granulated sugar
1 egg yolk
1 teaspoon vanilla
1 ¾ cup flour
½ teaspoon salt
chopped walnuts (to taste)

Instructions:

Preheat Oven to 350°F.

In a mixing bowl cream butter and add sugar, beating until fluffy.  Beat in egg yolk and vanilla.  In a separate bowl sift flour and salt; add to cream mixture.

Spread evenly in a 13x9x2-inch greased baking pan.  Brush tops with egg whites and sprinkle with nuts.  Bake for 30-35 minutes.