Bitter-Sweet Gâteau Chocolat

I love chocolate cake, and who doesn't?!
I have 2 good chocolate cake recipe, one is very sweet, sugar licking sweet brownie which is great serving with pouring cream and everybody loves it.
Another one is this chocolate cake, a.k.a. Gâteau Chocolat.
This is not something very sweet but its biterness is just so great along with sweetened whipped cream or vanilla ice cream.
And also, this cake is kid-proof.
I guess little bitter for them, I would say, taste of grown-up.

ingredients(6~8 square pcs) *16cm square cake tin/ 6cm height

140g Milk Chocolate
75g Unsalted Butter
75g Fresh Cream
75g Egg Yolk
150g Egg White
150g Caster Sugar
75g Cocoa Powder(if you want it less bitter, use sweetened cocoa powder ex.cadbury)
30g Plain Flour

Preheat your oven to 160C.

1, Spray oil your cake tin and line with baking paper.
Place chocolate on double boil to melt, Also cream the butter in another bowl.
Place fresh cream in the microwave for 10 seconds to warm up.
Shift the cocoa power and flour together.

2, Add creamed butter into melted chocolate and mix using whisk, Add fresh cream also.
Gradually(about 1 tsp at a time) add egg yolk and mix well and then set by side.

3, Standing mixer or using electric mixer to make meringue.
Add caster sugar to egg white and mix until you get stiff peak.

4, Add 1/4 amount of meringue to chocolate mixture and folding by rubber spatula.
Then add shifted cocoa powder and flour and folding through.
Add remaining egg white into it and folding evenly, but not mixing it.
It seems the mixture losing fluffiness and may make you think "is it gonna be rising?"
Yes it will.

5, Scoop the mixture into the tin and place into preheated oven, bake for 50mins~1 hr.
You can check if its baked or not by give a shake the cake gently and if its still moving like water then its not baked.