Preheat oven to 350�F.
Cream together butter and sugars for about 1 minute.
Add egg and vanilla extract, beat in till combined.
Add dry ingredients until just combined.
Fold in oats, prunes, and walnuts.
Form into balls. Makes about 2 dozen 1-inch balls.
Bake for about 10 minutes. The edges should be golden brown, but don't overbake unless you prefer a crisper cookie. |