Step 1

Preheat the oven to 350º F. Spray a 9x13 inch pan with non-stick cooking spray. Set aside.

Step 2

Dice the apples into small pieces. Set aside.

Step 3

In a small bowl, combine the brown sugar and cinnamon, mix with a spoon to combine. Remove 3 tbsp and sprinkle over the apples. Set aside the remaining cinnamon sugar mixture. And set aside the apples.

Step 4

In a large mixing bowl, combine the sour cream, vegetable oil, eggs, and vanilla extract, beat with an electric mixer for 1 minute or until combined. Add in the cake mix, gently mixing with the beater. Add in the apples and mix by hand until incorporated. Pour the cake mixture into the 9x13 inch pan, smooth with a spatula.

Step 5

Sprinkle the remaining cinnamon sugar mixture all over the cake. Use a butter knife or spatula to swirl this mixture into the cake batter.

Step 6

Bake for 32-35 minutes or until a toothpick inserted in the center comes out clean. Remove the cake from the oven and allow it to cool while you make the glaze.

Step 7

In a mixing bowl combine the powdered sugar, milk and vanilla extract. Use a whisk to stir the mixture until it’s smooth.

Step 8

YOUR CHOICE: pour the glaze over the warm cake or let the cake cool completely then add the glaze. Serve right away or cover the cake pan with a lid and store on the counter until serving.