1/4 lb. butter
1/4 c. light brown sugar, firmly packed
1/4 tsp. salt
1 egg yolk
1/2 tsp. vanilla
1 c. sifted flour
1/3 c. fine chopped walnuts
Jelly

Cream butter, sugar, salt, egg yolk and vanilla in a medium sized mixing bowl. Gradually stir in flour, blending well. Cover and chill until firm enough to handle. Work with half of the dough at a time, keep remaining portion refrigerated. Shape dough into balls about the size of marbles (1 well rounded teaspoon of dough per ball). Roll in nuts.