Preheat oven to 350ºF.
Grease a loaf pan and set aside.
In a large bowl, cream together the melted butter, granulated sugar, and brown sugar.
Mix in the eggs, applesauce, sour cream, and vanilla extract until well combined.
Next, mix in the baking powder, baking soda, salt, and cinnamon until well combined.
Slowly mix in the flour until well combined.
Pour batter into the loaf pan and bake for 55-60 minutes.
Let cool at least 20 minutes before slicing and serving. Enjoy!