Preheat the oven to 375 ℉ and grease or line a mini muffin pan.
In a large bowl, add the oats and milk. Let sit for 5-10 minutes for oats to soak up moisture.
Add the eggs, applesauce, coconut oil, maple syrup, and pumpkin puree. Stir well to combine.
To the same bowl, add the flour, baking powder, baking soda, cinnamon and pumpkin pie spice. Stir to combine.
Fold in the chocolate chips if you are using them.
Spoon the batter into the mini muffin pan.
Bake for 20-22 minutes at 375 ℉ until golden on top and centres are cooked through.
Let muffins cool in the pan for 5 minutes and transfer to a wire cooling rack to finish cooling.