1 c. butter
1/2 c. brown sugar, firmly packed
2 eggs, separated
1 tsp. vanilla
2 c. flour
1/2 tsp. salt
Finely chopped nuts
1 can vanilla creamy frosting
M & M candies

Blend butter and sugar in a bowl. Stir in egg yolks and vanilla. Sift flour and salt into bowl, mix well, and chill for 1 hour. Roll into 1 inch balls.

Dip into slightly beaten egg whites. Roll in nuts. Place one inch apart on ungreased cookie sheet. Bake in 350 degree oven for 5 minutes. Press thumb gently into center of each. Bake 5 minutes longer; cool. Fill with frosting and top with M & M candies. Makes 4 dozen.