1/2 c. butter
1 c. firmly packed brown sugar
1 egg
1/2 tsp. vanilla
3/4 tsp. baking soda
3/4 tsp. baking powder
2 c. sifted flour
1/3 c. sour cream
1 3/4 c. salted whole cashews

Cream butter and sugar until fluffy. Combine dry ingredients and add alternately with sour cream, mixing well. Fold in nuts. Drop by teaspoonfuls onto greased cookie sheet. Bake at 400 degrees for 10 minutes. Cool and top with powdered sugar frosting.