1. Preparation of sponge roll: Prepare cake embryo with S.P sponge cake, about 0.02cm thick, scrape a layer of applesauce on the surface, push forward and slice. 2. Preparation of custard: Mix whipped cream with transparent and frozen raw materials. 3. Spread the sponge roll neatly on the mold wall, then pour the cream into the mold mouth, put it in the refrigerator for curing, trim the edges after curing, and cover it on the flat plate.