Ensure the egg whites are beaten to stiff peaks before folding into the batter for a lighter, airier cake texture.
Do not overcook the frosting; it will thicken further as it cools. If it gets too thick, whisk in a teaspoon of milk.
This cake freezes well. Wrap unfrosted layers tightly in plastic wrap and foil for up to 3 months.
For a richer flavor, you can toast the pecans and coconut lightly before adding them to the frosting.