Prepare Apple Blondie Base
Preheat oven to 350°F (176°C). Grease and line a 9-inch springform pan.
In a bowl, whisk flour, baking powder, salt, cinnamon, and nutmeg.
In a separate bowl, whisk melted butter and brown sugar until smooth. Add egg and vanilla; mix well.
Fold in dry ingredients just until combined. Gently fold in chopped apples.
Spread into pan and bake 25–30 minutes, until toothpick comes out with moist crumbs. Cool completely.
Make Cheesecake Filling
Lower oven to 325°F (163°C). Wrap pan with heavy foil to prevent leaks.
Beat cream cheese and brown sugar on medium until smooth, 3–4 minutes.
Add flour, sour cream, caramel sauce, vanilla, cinnamon, and nutmeg. Mix on low.
Add eggs one at a time, mixing on low until just combined.
Pour over cooled blondie base. Tap pan to remove air bubbles.
Place in water bath and bake for 1 hour 15 minutes, until center is slightly jiggly.
Turn off oven, crack door, and let cool 1 hour.
Remove from water bath, foil, and cool completely. Chill for at least 6 hours or overnight.
Prepare Cinnamon Apples
In skillet, melt butter over medium heat. Add apples, lemon juice, cinnamon, nutmeg, and brown sugar.
Cook 8–10 minutes, until tender and caramelized. Let cool.
Make Cinnamon Whipped Cream
Chill mixing bowl and beaters. Beat heavy cream, powdered sugar, vanilla, and cinnamon to stiff peaks.
Assemble Cheesecake
Remove cheesecake from springform pan. Top with cooled cinnamon apples and caramel drizzle.
Pipe or spoon whipped cream around edges. Let sit 20 minutes at room temp before serving.