Vegetable oil spray
1 1/2 c. all-purpose flour
2 tbsp. powdered sugar
1/2 c. unsaturated, unsalted butter
1 c. finely chopped walnuts
1 tsp. vanilla
3 tbsp. (approximately) cold water
1/3 c. powdered sugar

Preheat over to 350 degrees. Lightly spray a cookie sheet with vegetable oil spray.

In a large bowl, sift flour and sugar together. Cut in butter with a fork or pastry blender. Mix in walnuts, vanilla and enough cold water to make a soft dough.

Form into small rolls 1 inch long and 1/2 inch thick. Place 2 inches apart on prepared cookie sheet. Bake 25 to 30 minutes, or until firm. While cookies are still warm, roll them in powdered sugar.