Spread a thin, even layer of white frosting over each cookie.

Press the frosted side of the cookies into sanding sugar until fully coated.

Transfer pink frosting to a piping bag and cut a small tip.

Cut marshmallows in half crosswise.

Pipe pink pads onto the flat side of each marshmallow half.

Add a small dot of frosting to the sticky side and attach the marshmallow feet to the cookie.

Pipe frosting onto a mini marshmallow and press it above the feet to form the tail.

Refrigerate the cookies for at least 30 minutes to set.