Giraffe Swiss Roll （长颈鹿图案的瑞士卷）

I find this recipe in YouTube video

Recipe

https://youtu.be/L9hJpvwPfa8

Ingredient

• Eggs 4
• Sugar for yolk 20g
• Sugar for egg white 30g
• Milk 70g
• Oil 20g
• Cake flour 80g
• Cocoa powder 1 teaspoon
• Whipping cream 200g
• Strawberry some

I’ve been making muffin, chiffon cake and bread in the past few months. I’ve not baked Swiss roll for quite some time. The video looks interesting, especially the giraffe pattern is funny. I decide to try this recipe. 

While I was preparing the ingredients for making Swiss roll, niuniu swam in the pool. When she came back, she was surprised to find  I’ve already started beating the egg white and did not wait for her as I promised. She instantly got angry and even started to cry, saying “mama is a baby” to vent her anger. She was irritated because she thought I did not keep my promise. I reassured her that she would do  the most difficult step - using the piping bag to make the giraffe pattern. She stopping crying finally and did a good job

Despite that I follow the steps closely, it turns out not a success, if not a complete failure. There are several issues. The first issue is a special layer which is formed at the bottom of the cake that tastes harder than the rest. I encountered the same problem in the past and have not yet found a solution. 

The second big problem is that the cake breaks easily when I rolled it. I also encountered same issue before.  

The third problem is that the batter is not enough to cover the baking pan 20cm*30cm. Hence, the resulting cake is quite thin. I need to increase the quantity of ingredients for a thicker  cake.

Although the Swiss roll is far from a success, kids love it and eat it all within seconds. That really encourages me to explore how to fix the above problems to make a really successful Swiss roll