Sift in sugar and add vanilla. If too soft to spread, chill a bit.
Refrigerate if not using immediately.
Bring to a spreadable temperature before using.
ASSEMBLY: Have filling and frosting at a spreadable consistency. Loosen cake in pan and invert. With a long serrated knife, carefully split the cake into 3 horizontal layers. Spread filling between layers. Spread frosting over top and sides.
Cook’s Note: This cake is best made if you start at least one day ahead, since the filling is best left to chill overnight.
Recipe by Pizza Today at https://staging-pizzatoday.kinsta.cloud/recipes/desserts/carrot-cake-supreme