Chocolate Roll Cake

Material / seasoning :
12 egg yolks
1 egg white
1/4 teaspoon salt
100 salt sugar
50 grams of cake flour
15 grams of cornstarch
25 grams of cocoa powder
1/4 teaspoon baking powder
1/2 teaspoon brown paste
100 grams of salted butter , melted
Material Content :
100 ml heavy cream
125 grams dark cooking chocolate , cut into pieces
Topping ingredients :
100 ml heavy cream
175 grams dark cooking chocolate , cut into pieces
How to make :

    Contents , heat the heavy cream . Add chunks of dark cooking chocolate . Stir until the chocolate dissolves . Chill . Whisk until smooth . Set aside .
    Cake , beat eggs , salt , and sugar until fluffy . Add flour , cornstarch , cocoa powder , and baking powder as she sifted and mix evenly .
    Enter the salted butter and brown pasta , stirring gently .
    Pour diloyang 30x25x3 cm dialas paper spread with margarine and bread .
    Under fire oven with temperatures of 190 degrees Celsius 20 minutes until cooked .
    Oles cake with the content material . Roll up and condense .
    Topping , heat the heavy cream . Add chunks of dark cooking chocolate . Stir until the chocolate dissolves .
    Sprinkle topping over rolls .