Grease and flour on a flat cake pan; cover bottoms with waxed paper. Sift cake flour, corn starch, cocoa powder and salt.
Step 3
3
In a large bow, beat the egg yolks; add milk and vegetable oil and mix well.
Step 4
4
Add the cake flour mixture.
Step 5
5
In the mixer, add the egg white, sugar, and cream of tartar. Turn on with low speed for 1 min; 4th speed option for 3 min; 7th speed option for 6 min; 4th speed option for 1 min; until the egg whites form stiff, glossy peaks.
Step 6
6
Mix in the egg whites to the cake mixture with a spatula until it comes together.
Step 7
7
Turn out dough onto a surface dusted with flour, and knead until dough is soft and elastic. (5-10 minutes)
Step 8
8
Pour the cake mixture into the baking pan and bake for 15 min at 340°F(175°C).
Step 9
9
In a large bowl, mix whipped cream and Nutella.
Step 10
10
Cut cake into about 2-inch strips.
Step 11
11
Spread Nutella and cream mixture over top. Stack 3 cake strips together.
Step 12
12
Freeze for 15 minutes. Cut cake into squares.
Step 13
13
Coat cake squares with melted chocolate; add cereal flakes all over.