Heat the oven to 350°F. Line an 8X8" baking pan with parchment paper. Set aside.

In a mixing bowl add the flour, baking powder and sugar. Make a well in the middle.

Add the melted butter, water and two egg yolks to the well. Stir to combine. Fold in the grated chocolate.

In a clean, grease free bowl, add the egg whites and whisk them until firm peaks form.

With a spatula, fold the egg whites into the chocolate mixture until all ingredients are combined.

Spoon the mixture into the prepared baking pan and bake in preheated oven for 25 minutes or until a toothpick inserted in the middle comes out clean.

Leave the cake to cool completely in the pan.

Once cooled, take the cake out of the pan, by gently inverting it, cut it into 16 squares and set aside.

In a small heatproof bowl, heat the half and half and pour over the chopped chocolate, stirring to combine.

Take each piece of cake and dip it into the chocolate sauce. Do the same with the remaining 15 pieces.

Once all the cakes are dipped in chocolate, grate some chocolate on top of them, if you prefer.