This recipe kicks carrot cake to elegant new heights. Tender layers of carrot-tinted spice cake are sandwiched with a luscious coconut-pecan filling--and it's all covered in swirls of classic cream cheese frosting. It's an event to make (plan for some dish-washing), but well worth the effort. To spread the work over two days, make the carrot puree and start the Coconut-Pecan Fluff Filling on Day 1 and let them chill overnight. Then finish it all off on Day 2.