1. For shells: Mix together cream cheese, flour, and 1/4 lb butter.

2. Roll mixture into small balls, press into ungreased cupcake tins.

3. Chill.

4. For filling: Mix together chopped walnuts, vanilla, 1 tbsp butter, egg, and light brown sugar.

5. Fill tins with the filling mixture.

6. Bake at 325°F for 25-30 minutes.

7. When cool, sprinkle with powdered sugar.