Preheat your oven to 350°F and spray pan with cooking spray.  

 Add the applesauce, vegetable oil, vanilla extract, and Milk to a mixing bowl.

Add sugar followed by the self-rising flour and mix until a batter is formed.

Pour the batter into the prepared cake pan. 

Bake for 30-35 minutes, or until a toothpick or a skewer inserted into the center comes out clean.

Let the cake cool in the pan for 10 minutes before inverting it onto a wire rack to cool completely. This cake is best served at room temperature.  

Frost (Optional): Once cooled, frost the cake with your favorite frosting.  You can also dust with powdered sugar or eat it as is.