Preheat the oven to 180 deg c / 350 F .
Grease the baking dish and set aside.
Separate egg white and egg yolk in two seperate bowls and set aside.
In a bowl , add 1 cup all purpose flour , baking powder and salt , mix well together and keep aside.
With help of electric hand blender or a stand blender ,beat Egg Yolk on high speed.
Stream in ¾ cup of sugar to egg yolk and continue to beat on high speed in a one way direction only till it turns pale yellow colour.
Now slowly add in milk and vanilla , continue to beat on medium speed, in the same direction.
Add in dry ingredients slowly and continue to beat on low speed till dry ingredients just incorporates with egg yolk. DON'T BEAT MORE , AS IT MAY DRY OUT THE CAKE.
Transfer the mixture into a bowl and set aside.
Now using electric hand blender , whip egg whites till light and foamy.
Gradually, add ¼ cup sugar and continue to whip till stiff peaks are formed.
Now add in the whipped egg whites to egg yolk mixture.
Using a wide spatula , from bottom mix in a circular motion just to fold in and combine egg yolk mixture with egg whites.
Pour the batter to greased baking dish , level it.
Bake in a preheated oven for 35 to 40 minutes.
Whilst prepare milk syrup by combining evaporated milk , condensed milk and whole milk together , set aside for later use.
Once cake is baked , allow it to cool . Take a wide plate , place the baked cake tin upside down , gently tap and transfer the cake on a plate .
With a toothpick , prick cake evenly to form more holes on top of the cake.
Pour in half the quantity of milk syrup and just wait for 1- 2 minutes for cake to absorb the milk on top . Pour remaining milk evenly on top of the cake.
Refrigerate for minimum 1 hour or overnight for milk syrup to absorb completely .
Remove cake from refrigerator , add 1 ½ cup heavy whipped cream on top of the cake level it.
Dust 1 teaspoon of cinnamon powder on top of the cake.
While serving , top it with some fresh berries and serve.