Heat oven to 350°F. In medium bowl, break up cookie dough. Knead in flour until well blended.
On floured surface, roll dough to 1/4-inch thickness. Cut with floured 3 3/4-inch bellshaped cookie cutter. On ungreased cookie sheet, place cutouts 2 inches apart. Reroll dough and cut additional cookies.
Bake 10 to 12 minutes or until edges are lightly browned. Cool 5 minutes; remove from cookie sheet to cooling rack. Cool completely.
Spread tops of cookies with white icing; sprinkle with sanding sugar. Let stand until set.