Preheat the oven to 425°F. In a microwave safe container, melt the butter and let cool to room temperature.
In a large bowl, combine the dry ingredients (whole wheat flour, oatmeal, cinnamon, baking soda, baking powder, and salt). Set aside.
In a separate small bowl, whisk together the wet ingredients (applesauce, eggs, melted butter (ghee or oil), maple syrup, and vanilla extract).
Pour the wet ingredients into the bowl of the dry ingredients. If you are using raisins, also add the raisins into the bowl of dry ingredients. With a silicone spatula, fold the ingredients together until combined.
Place muffin liners into a 12-count muffin pan. Spray with cooking spray or non-stick spray.
Scoop the muffin batter into the muffin liners. Make sure to fill the liners with the batter all the way to the top! For a prettier muffin, sprinkle rolled oatmeal on top.
Bake the muffins at 425°F for five minutes. Lower the temperature to 350°F and bake for an additional 18 minutes. You will know when the muffins are ready when you insert a toothpick in the center of a muffin and it comes out clean.
Take the muffins out of the muffin tins. Let the muffins cool on a cooling rack until ready to eat.
