Preheat the oven to 350ºF.
In a large bowl, mix the dry ingredients with the diced apple.
In a small bowl, melt the ghee or coconut oil, then stir in the honey or maple syrup, vanilla, and eggs.
Add the wet ingredients to the dry ingredients & stir until just combined.
Grease a 12-cup muffin tin with cooking fat or spray, and scoop the mixture in.
Bake at 350ºF for about 15 to 18 minutes, or until the tops begin to turn golden brown and feel slightly firm/springy to the touch.
Allow the muffins to cool & enjoy! They are extra delicious sliced in half and slathered with almond butter or ghee.