1 c  Shortening
1/2 c  Brown sugar
2    Egg yolks
1 ts Vanilla
2 c  Flour, sifted
1/2 ts Salt

Mix ingredients well, then roll into small balls. Dip each ball into
beaten egg white that has been beaten stiff, then into nuts. Bake for
5 minutes at 350. Take out and press thumb in middle. Bake 8 minutes
longer. When cool, fill with buttercream icing.