1Heat oven to 375°F. Make cookies as directed on pouch, using butter and egg, except drop dough by rounded tablespoonfuls 2 inches apart onto ungreased cookie sheet.
2Bake 11 to 13 minutes or until edges are light golden brown. Cool 1 minute before removing from cookie sheet. Cool completely, about 30 minutes.
3For each ice cream sandwich, place 1 scoop of ice cream (about 1/3 cup) between 2 cookies. Gently press cookies together (ice cream should spread to edge of cookies). Roll ice cream edges in sprinkles. Eat immediately, OR to save for later, wrap sandwiches individually in plastic wrap. Place in resealable freezer bag, and freeze until needed.