Swiss roll with caramel cream filling

Recipe :
Ingredients :
* Eggyolk mixture :
- 3 eggyolks
-70g cakeflour + 5g corn flour , sift together
-40g corn oil
- 50g fresh milk
* Eggwhite mixture :
- 3 eggwhites
- 75g caster suger
- 1/4 tsp cream of tartar
* Filling :
- 250ml whipping cream
- 2 tbsp icing sugar
- 1 tsp caramel powder
Method :
 * Prepare a swiss roll tray lined with baking paper . Preheat the oven at 210 degree C ( 190 degree C - fan forced ). Prepare another sheet of baking paper that is bigger than the tray .
 * Eggyolk mixture : Put all ingredients in a mixing bowl . Use a baloon whisk , mix all together till smooth and creamy . Leave aside .
 * Eggwhite mixture : Put eggwhites in another dry and clean mixing bowl . Beat with a mixer till foamy , slowly add in sugar and cream of tartar . Beat until eggwhite become soft peak .
 * Add 1/2 the yolk mixture into the whites , fold gently with a spatula to combine , fold in the rest of the yolk mixture until well mixed . Pour the batter into prepared tray. Bake for 12 mins in the preheated oven.
 * When the cake is cooked , take out from the oven . Turn the cake upside down onto prepared baking paper immediately , roll the cake while it still hot to get in shape . Let cook on rack .
 * Filling : pour everything into a mixing bowl , stir to mix . Let cold in the fridge for 1 hour . Use mixer to beat until thick .
 * When the cake is cooled , unfold it gently , spread caramel cream on it , roll it back without the baking paper . Slide to serve.
 I am submitting this to Aspiring Bakers #9 : Swiss rolling good time , hosted by Obsessedly Involved with Food .