Preheat the oven to 350 degrees Fahrenheit. Line a muffin tin with 9 paper liners. If you don’t have muffin liners on hand, you can spray the holes with cooking spray.

Transfer the oats to a blender and blend for 60 seconds, or until a flour forms.

Add the baking powder, sea salt, and ground cinnamon to the blender and blend for another 10 seconds or so, until all of the dry ingredients are well combined.

Add the eggs, unsweetened applesauce, pure maple syrup, avocado oil, and pure vanilla extract to a large bowl. Whisk until the wet ingredients are well-combined.

Transfer the oat flour mixture to the mixing bowl with the wet ingredients. Mix until a smooth batter forms.

Pour the muffin batter into the prepared muffin pan, filling the muffin cups most of the way up. If you'd like, sprinkle the top of the muffins with oats or chopped nuts.

Bake on the center rack of the preheated oven for 20-25 minutes, or until the muffins are golden brown around the edges and test clean.

A great way of ensuring muffins are baked through is taking their internal temperature using a digital thermometer. If the temperature is 190 degrees Fahrenheit or higher, they are fully baked. Simply insert a thermometer into the center of a muffin and wait until the numbers stop moving to get an accurate read.

Allow the applesauce oat muffins to cool completely to room temperature before peeling off a muffin liner to eat one. If the muffins are still warm when you peel off the papers, you will lose some muffin to the paper.