The pectin in the apple helps thicken the cookie mixture without baking. Store these cookies in an airtight container at room temperature.

1. In heavy saucepan, melt butter with sugars over medium heat, then stir in apple. Bring to a boil, then stir and boil for 1 minute.

2. Remove from heat and add cinnamon, oatmeal, and walnuts; stir to combine. Let stand for 5 minutes.

3. Place powdered sugar on shallow pan. Drop apple mixture by teaspoons into powdered sugar and roll into balls.

4. Place on waxed paper and let stand until the cookies are firm.