Preheat the oven to 180 degrees Celsius. Prepare the baking pan by layering it with parchment paper or greasing it with butter and flour to make sure that the cake does not stick while baking.
Place the egg white and yolks in two separate bowls and add half the sugar in each bowl. Whip the egg yolks until they are light and fluffy and the egg whites until they are thick, fluffy, and reach stiff peaks.
4 eggs, separated into whites and yolks, 70 gs white granulated sugar
Now, add the egg white mix and the flour into the egg yolk mix alternatively, 1/3rd at a time. Fold the mix after each addition with a silicone spatula gently, making sure not to knock the air out of the mixture. There is no baking powder in this cake. The airiness of the egg whites is what helps the cake rise and gives it that spongey texture. If you knock a lot of air off while mixing, your cake will be flat and dense.
80 gs all-purpose flour
Once everything is well combined, transfer the cake batter into the prepared baking pan and bake for 15-20 minutes, until a toothpick comes out clean from the center. The cake layer should not be too thick, around 2 inches.
As soon as the cake comes out of the oven, poke holes into it using a fork (to help the milk soak better). While the cake is still hot, pour a generous amount of the milk and let it cool.
Make the milk mixture: In a bowl, place all the ingredients for the milk: liquid whipping cream, condensed milk, evaporated milk, cardamom powder, and saffron, and mix until fully combined.
80 ml liquid whipping cream, 140 ml condensed milk, 50 ml evaporated milk, 1/2 tsp cardamom powder, 1/2 tsp saffron