Finally, add the coconut along with the nuts and blend a final time. Now, in a big glass or a metal mixing bowl, beat the egg whites until stiff peaks form. Once done, add ⅓ of the whites in the flour mixture, blend, add the remaining egg whites, and blend until no streaks remain. Divide the batter equally into the three pans and bake for about 40 to 45 minutes in the preheated oven. Invert the cakes onto a wire rack and let cool.