Make ahead tip: Baked crisp freezes well for up to 3 months. Thaw overnight in the refrigerator, then warm in a 350°F (177°C) for 20 minutes or until heated through. I do not suggest preparing the crisp and storing it, unbaked, in the refrigerator. The topping will get soggy. You can, however, prepare the crisp through step 3 and freeze for up to 3 months. Allow to thaw overnight in the refrigerator, then continue with step 4.