Preheat oven to 350 degrees F.
In a large mixing bowl, combine brown sugar, applesauce, eggs, yogurt, and vanilla.
Beat until well combined.
In a separate bowl, whisk together the flour, oats, salt, baking powder, and cinnamon.
Add flour mixture to applesauce mixture all at once.
Mix again until well combined. Make sure to scrape the sides and bottom of the bowl.
Prepare a muffin pan with Baker's Joy or paper muffin cups.
Divide batter into vessels of the muffin/cupcake pan.
Bake 30 - 35 minutes or until a knife inserted in the center of a muffin comes out clean.
Store in an airtight container.