1. Heat oven to 375 degrees. Lightly grease cookie sheets.
2. Reserve 1/3 cup of frosting.
3. In a large bowl combine the remaining frosting, peanut butter and egg; blend well.
4. Stir in flour by hand.
5. Shape dough into 1 inch balls. Place 2 inches apart on greased cookie sheet.
6. With bottom of glass dipped in sugar, flatten each ball to a 2 inch circle.
7. Bake at 375 degrees for 4-7 minutes or until set. Do not overbake. Cool 1 minute; remove from cookie sheets.
8. Cool completely. Lightly frost with reserved frosting.
