For the boiled frosting, combine the water and sugar in a saucepan over medium heat. Without stirring, let it cook until it reaches the soft ball stage.

In a mixer, beat the egg whites until stiff peaks form. When they are fluffy, add the lemon juice.

Once the syrup reaches the right stage, slowly pour it in a thin stream into the egg whites while beating, until stiff peaks form.

For the chocolate frosting, melt the butter in a small saucepan over medium heat. Add the sweetened condensed milk and cocoa powder, stirring to combine.