In a salad bowl, mix the flour, the cornstarch, the grated coconut, the baking powder, the sugar and the salt.
Make a small cavity in the center of the mixture. Add the eggs, the avocado puree, the lemon zest, the oil and the coconut milk. Mix until you get a homogeneous dough.
Grease and flour the cake mold. Pour in the dough.
Bake for 50 to 60 min.
For glazing (optional)
Dilute the powdered sugar in the lemon juice. Pour the mixture on the cake (after cooling).