Angel Whisper Cookies 
These are so good!

1 cup butter
1/2 cup confectioners' sugar
2 cups all-purpose flour
1 tsp. lemon zest
1/2 tsp. salt

Filling:
1 egg, beaten
2/3 cup white sugar
1 1/2 tsp. lemon zest
3 tbsp. lemon juice
1 1/2 tbsp. butter

1. In a medium bowl, cream together butter and confectioners' sugar until light. Stir in the lemon peel, flour and salt. Cover bowl, and chill for about 1 hour.

2. Preheat oven to 400�F.

3. Flatten teaspoons of dough onto cookie sheets, and bake for 5 to 8 minutes, until light brown. Remove from baking sheets to cool on racks.

4. To make the filling, combine the beaten egg, sugar, lemon zest, lemon juice and butter in the top of a double boiler. Stir until thick. Sandwich cookies with 1 tsp. of filling.