1/2 c. butter
1/4 c. brown sugar
1 egg, separated
1/2 tsp. vanilla
1 c. flour
1/4 tsp. salt
Jelly
Chopped nuts (opt.)

Heat oven to 350 degrees. Mix butter, sugar, egg yolk and vanilla. Measure flour, blend in salt; stir into butter mix. Roll dough into golf ball sized balls; dip into beaten egg white. Roll in nuts, if desired. Place on cookie sheet and gently press thumb in center. Bake 10 to 12 minutes. Cool; fill with jelly. Approximately 3 dozen.