Heat oven to 350°F. In large bowl, knead cookie dough and flour with hands until well mixed.
Reshape dough into 9x1 1/2-inch log.
Wrap in plastic wrap; refrigerate 30 minutes.Remove plastic wrap. Cut cookie dough into 33 slices. Cut 11 slices into 4 equal wedges; shape each wedge into ovals for bunny feet. Place cookie dough slices and bunny feet on ungreased cookie sheet.
Bake 8 to 12 minutes or until edges are light golden brown. Cool 1 minute; remove from cookie sheets to cooling racks. Cool completely, about 15 minutes.
In medium microwavable bowl, stir frosting and 1 to 3 drops pink food color until well blended. Microwave uncovered on High 10 to 15 seconds or until soft but not translucent.
To make bunny butt, frost 1 whole cookie slice and 2 bunny feet with frosting. Place bunny feet on bottom of cookie as shown in photo. Place 1 marshmallow in center of each cookie for tail. Decorate bunny paws with candy sprinkles. Repeat with remaining cookie slices and bunny feet.