Beat the eggs, coconut milk, honey and stevia (if using) together with vanilla and any flavor extracts until smooth, creamy and uniform in both color and texture.
Sift together the coconut flour, baking powder and sea salt, and add to the egg mixture. Continue to beat until a smooth batter forms.
Gently fold nuts, cacao nibs, diced fruit, etc. into the batter, if using.
Grease and flour two 8-inch, round cake pans.
Spoon the cake batter into the greased and floured pans. Shake them to even out the batter and smooth it out with the back of a spoon or a rubber spatula.
Bake for 30-35 minutes, or until the cake pulls away from the sides of the pan and a toothpick inserted into the center of the cake comes out clean.
Let cool completely before assembling and frosting your cake.