Colorful Cake Rolls
                            
                                1.
                                Separate the eggs, the basin has no water and no oil
                                    
                            
                            
                                2.
                                Stir milk and oil well, sift into flour, mix well, add egg yolk, mix well
                                    
                            
                            
                                3.
                                Stir it into a more delicate batter
                                    
                            
                            
                                4.
                                Add the egg whites in 3 times and add sugar to beat until moist foaming
                                    
                            
                            
                                5.
                                Take one third of the egg white and add it to the egg yolk paste, stir well, then pour it back into the egg yolk paste, stir well
                                    
                            
                            
                                6.
                                Prepare 3 small bowls, put 10 grams of batter each, add a small amount of coloring matter, stir well, put in a piping bag, preheat the oven to 170 degrees
                                    
                            
                            
                                7.
                                Prepare a 28cm gold plate, put on a silicone pad, squeeze a few shapes, with any color, and bake in the oven for two minutes.
                                    
                            
                            
                                8.
                                Pour the batter into the baking pan and shake out bubbles. 170 degrees, bake for 16 minutes
                                    
                            
                            
                                9.
                                Take out the cake~shock it out of heat
                                    
                            
                            
                                10.
                                Scratch the surface to release the mold and buckle upside down on the net
                                    
                            
                            
                                11.
                                Tear off the greased paper on the back and let it dry until it is not hot
                                    
                            
                            
                                12.
                                Cover a piece of greased paper, then cover a flat object, turn the cake roll over
                                    
                            
                            
                                13.
                                Cut off the rough edges, this is the starting edge
                                    
                            
                            
                                14.
                                Take the first one or two centimeters of the cake roll and fold it in half with your fingers. The cake roll is very good and very elastic.
                                    
                            
                            
                                15.
                                Pull up the oil paper and push forward, it is very good, and the roll is very even
                                    
                            
                            
                                16.
                                Cut a bevel at the end, and after a while, the interface will be flat
                                    
                            
                            
                                17.
                                Look, very flat
                                    
                            
                            
                                18.
                                Leave it for a while
                                    
                            
                            
                                19.
                                Whip the cream with chocolate sauce, spread less on the end of the cake roll, and roll it up again according to the previous roll marks
                                    
                            
                            
                                20.
                                Tighten the cake roll tightly with a rolling pin and put it in the refrigerator for 3 hours
                                    
                            
                            
                                21.
                                Every time you cut a knife, wipe the knife to keep the cut perfect