Stuck between a rock-like dining hall biscuit and a hard, stale box of Entenmann's, Harvard students now have a place to turn. After five years of satisfying the late-night cravings of the Boston area college community, Five Star Cookie Company has added Harvard to its delivery route. Warm, freshly baked cookies, with milk and ice cream on the side, can be delivered to every Harvard student's dorm room door. The menu includes four flavors of hot cookies--chocolate chunk, double fudge, peanut butter cup and oatmeal raisin--eight flavors of tasty Ben and Jerry's ice cream and cold, refreshing milk that washes it all down. 16 cookies for $14, 32 cookies for $24 and a giant 12-inch cookie for $16. Delivery is free. Delivery from 7 to 12 p.m., Sunday to Thursday. 783-8833.