Begin with Design on cake, this is optional. You can skip this entire process and begin with cake and it's filling preparation directly
Design : Cut out parchment paper of size of baking tray of 33*19 cm pan and grease top well. Select design required and place it below parchment paper. Place over board for ease of handling
Mix all ingredients mentioned under Design section except food colouring. Incase mixture is too thick, only then add few drops of water
Add required food colouring gel and whisk well. If multiple colours are required, then divide mixture into various bowls and mix required colours
Pour the mixture into piping bag, seal it and cut very small portion at tip
Now pipe the mixture on top of parchment paper based on design template
Tap the design gently. Freeze the parchment paper placed on board as is for 35-45 minutes
Preheat oven to 170. Grease baking tray of 33*19 cm pan and keep it aside
In a bowl whisk egg whites. Gradually add 30 g sugar to it and Whip to form peaks
In a bowl, whisk milk oil and orange juice. Keep it aside
Whisk egg yolk in a bowl with 30 g Sugar. Add milk mixture and blend well
Add flour and blend well
Add food colouring if required and blend well.Slowly add egg whites mix to flour mixture and mix well.
Carefully place design parchment paper in greased baking tray. Pour cake batter carefully over parchment paper and gently spread all over. Tap tray
Bake for 10-12 minutes until firm to touch. Do not over bake as this is very thin cake. Keep eye on cake after 8th minute
Rest cake on counter for 3-4 minutes. Meanwhile spread powdered sugar on top of parchment paper.
Flip cake tray on parchment paper and tap on top
Gently lift tray and peel parchment paper on top of cake
Place a parchment paper on top of cake.
Now place tray or board on top and immediately flip the cake again. You can dust off the sugar or leave it as is
Start rolling the cake while it's still hot. If you allow to cool, the cake will start breaking or have cracks while rolling
Now cover it with kitchen towel and wrap from all sides. Allow to cool completely
In a bowl, add whipped cream and sugar. Blend well
Add orange zest and blend well
Unwrap the cake and now gently evenly spread the filling
Now roll the cake again. Wrap with parchment paper or towel and refrigerate for 2-3 hours
Slice and serve
