Cloud-Light Soufflé Cake

Combine the milk and butter in a small pot over medium heat and let the butter melt completely.

Sift the flour into a large bowl and pour the hot milk and butter mixture over it, stirring well to combine.

Fold in the egg yolks and mix until you have a smooth, homogeneous batter.

Whip the egg whites until foamy. Add the sugar and continue whipping on medium-low speed until the sugar dissolves completely.

Fold one-third of the whites into the yolk mixture, mixing gently.

Add another third, fold and mix gently, then repeat this one more time.

Transfer the batter to a buttered cake pan and place it inside a larger roasting pan filled with hot (not boiling) water.