Butter Balls

This recipe is from my mother in law and I love these cookies, and so does my husband.

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Ingredients :
2 cups butter
1 cup confectioner sugar
4 cups flour
2 tsp vanilla
2 cups chopped walnuts

Instruction :
Cream butter until light and fluffy. Beat in powdered sugar and flour. Add vanilla and nuts, continue mixing by hand until all flour has been absorbed and nuts are evenly dispersed.
Shape into small 1" balls.
Place on ungreased baking sheet.
Bake in 350 F for 12 - 15 minutes. Cool.
Shift powdered sugar over.