Frosting
In the bottle of Sprite, add the egg yolks and shake very well until the egg yolks are completely dissolved.
Next, pour this mixture into a blender, add the egg whites, the butter and blend everything very well to combine.
Now, transfer to a large bowl, add the sugar, the wheat flour and mix.
Add the lime zest, the baking powder and mix gently.
Transfer this batter to a 22cm diameter cake pan greased with margarine and wheat flour.
Take it to a preheated oven at 180° C (350° F) and bake for 35 minutes.
In a medium bowl, add the condensed milk, the refined sugar, the powdered milk and mix.
After the cake has baked, pour the frosting we prepared all over it.
Serve.