Preheat oven to 350°F (175°C).

In a mixing bowl, combine shortening, 1 cup of powdered sugar, and vanilla extract.

Beat on medium speed until well blended.

In a separate bowl, whisk together flour, baking soda, and salt.

Gradually add the dry ingredients to the creamed mixture.

Mix until well combined.

Stir in finely chopped walnuts.

Roll dough into walnut-sized balls.

Place the balls on ungreased baking sheets, about 1 1/2 inches apart.

Bake for 15 minutes, or until the edges begin to brown slightly.

Let the cookies cool on the baking sheets until they are cool enough to handle, but still warm.

While still warm, roll each cookie in the remaining 1 cup of powdered sugar.

Place the sugared cookies on cooling racks to cool completely.