This recipe must chill overnight, so plan ahead. It makes roughly 4 dozen small cookies.

If you substitute butter for shortening, use ¼ c. milk instead of ⅓ c.

Ingredients Step
½ c. shortening
1⅔ c. sugar		 Cream together.
2 t. vanilla
2 eggs, beaten
2 oz. unsweetened Baker's chocolate, melted		 Add & beat.
2 c. flour, sifted
2 t. baking powder
½ t. salt		 Sift together.
⅓ c. milk (or ¼ c. if using butter) Add to the mixer alternately with dry ingredients.
½ c. walnuts, chopped Stir in.
Scrape down bowl, cover, and chill overnight.
powdered sugar Preheat oven to 350 degrees. Grease cookie sheets. Form dough into 1-inch balls. Roll in confectioner's sugar. Bake at 350 degrees for about 15 minutes.

Source: my grandma