Preparation: spread parchment paper on a cookie sheet. Sift the flour. Divide the eggs into egg yolks and whites. Warm milk to about skin temperature. Preheat an oven to 190°C.

Rap the bottom of the pan 2~3 times after pouring the batter into the pan to remove air bubbles. Bake at 190°C for 15~17 minutes. It's good to go once you stick a toothpick and it comes out clean! (The baking time and temperature used will vary by your oven, so adjust.)

After baking, place on top of a rack while it's still in the pan. Cover tightly with plastic wrap to keep it from drying out (this will also remove the uneven portions of the cake when removing the wrap and make the surface neater).

Cream: Add sugar and vanilla extract to the heavy cream, and mix to your desired firmness. It might be difficult to roll if the cream is too loose. It will have a lumpy texture if it's too hard as well, so mix while checking it.

Remove the cooking sheet from the bottom, and place the cake on top of a new sheet (or plastic wrap). Cut the overlap of the cake at an angle. Spread the heavy cream (Leave about 2~3 cm of the overlap clear of cream), pick up the parchment paper underneath (or plastic wrap), and slowly wrap it up.