Step 1

Preheat oven to 400 degrees F. Grease a 17 x 12-inch sheet pan with non-stick spray. Set aside.

Step 2

In a large bowl, combine flour, baking soda, both sugars, cinnamon and nutmeg. Use a whisk to combine and sift together. Set aside.

Step 3

In a large saucepan, over medium heat, add butter and water. Stir until butter melts. Bring to a boil, once it starts to boil remove from heat and add flour mixture. Stir to combine. Then stir in buttermilk, eggs and vanilla extract. Fold in chopped apples.

Step 4

Spread cake batter evenly into the prepared sheet pan.

Step 5

Bake 18 to 20 minutes, or until toothpick inserted in center comes out clean. Remove from oven and let cool slightly while you make the glaze.

Step 6

Place butter and milk in a medium microwave-safe bowl. Heat until butter melts. Using a whisk, stir in powdered sugar, caramel syrup and vanilla. Stir until smooth and combined.

Step 7

Pour glaze evenly over warm cake. Let stand 20 minutes or so before serving. Slice into squares and enjoy!