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1
Leave eggs at room temperature.
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2
Melt butter and mix with vanilla oil.
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3
Chop chocolate finely.
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4
Preheat oven to 190C (374 F).
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5
Cut a sheet of baking paper to the size of the pan.
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6
Fold the 4 corners and staple to keep the shape.
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7
I used a 30 cm x 22 cm pan.
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8
Crack eggs in a bowl and beat with an electric beater.
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9
Add sugar gradually as you mix and stir until it becomes a ribbon consistency.
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10
The mixture should fall in a ribbon that swirls on top for a few seconds before sinking into the batter.
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11
Sift cake flour and cocoa powder into the bowl and combine using a cutting motion with spatula.
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12
Now pour in the butter while the mixture is still powdery, and mix using the same cutting motion.
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13
Pour in the batter into the middle of your baking pan.
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14
Spread with a bench scraper and lightly tap on the kitchen counter a few times to release any air trapped inside.
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15
Bake in a preheated oven at 190C for about 8 minutes.
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16
Once it cools, cover with plastic wrap to prevent drying out.
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17
Heat heavy cream in a sauce pan and when it is about to boil, remove from heat.
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18
Melt chocolate in and combine, allowing the chocolate to melt from the heat of the cream.
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19
Once the chocolate has melted completely, transfer to a mixing bowl.
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20
Mix with electric beater only until swirls have a smooth consistency.
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21
Decide which way you will roll the cake and then cut diagonally about 1 cm off from the end edge.
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22
Spread half of the cream over the cake but leave 1 cm at the edge without cream.
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23
Roll the cake as you separate from the baking paper and then wrap the rolled cake with the same paper.
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24
Now squeeze the roll and wrap with plastic wrap.
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25
Place in the fridge for a while.
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26
Transfer the cake onto a tray and stabilize the shape.
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27
Spread and cover the remaining 3/4 cream over the cake with spatula.
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28
Slice 1~2 cm off both ends.
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29
Then take a 5-6 cm diagonal slice from one side and place on top of the roll cake.
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30
Spread remaining cream to stabilize.
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31
Using the back of a fork, drag lines all over the cake like a tree stump.
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32
Place in the fridge again for a while to rest and decorate.
