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

2. Roll mixture into small balls and press into ungreased cupcake tins. Chill.

3. For filling: Mix together chopped walnuts, egg, vanilla, light brown sugar (do not pack down), and 1 tbsp butter.

4. Fill the chilled shells with the filling.

5. Bake at 325°F for 25-30 minutes.

6. When cool, sprinkle with powdered sugar.