Prepare the pan & crusts

• Line a standard 9‑cup cupcake pan with paper liners.

• Preheat your oven to 325 °F (163 °C).

• In a small bowl, mix together the graham cracker crumbs, cinnamon, and sugar. Pour in the melted butter, stirring until evenly moistened.

• Press about 1¾ to 2 tablespoons of this mixture firmly into the bottom of each paper liner (you want a solid base but it doesn’t need to come up the sides much).

• Place the pan in the fridge to chill while you make the other components.

Make the crumb topping

• In another bowl, stir together flour, brown sugar, oats, cinnamon, and nutmeg.

• Add the melted butter and mix until coarse crumbs form (a bit chunky is fine).

• Chill this topping in the fridge until you’re ready to use it—this helps it stay crisp when baked.

Cheesecake filling

• In a mixing bowl, beat softened cream cheese, sugar, vanilla, and flour until smooth and creamy.

• Add the egg and mix just until incorporated—don’t overbeat or you’ll introduce too much air.

• Divide this filling among the lined pans, filling about ⅔ full in each cup.

Apple filling

• Toss the finely chopped apples with lemon juice immediately (this prevents browning).

• Add brown sugar, cornstarch, cinnamon, and nutmeg. Stir until the apples are coated.

• Spoon the apple mixture over the cheesecake layer in each cup—fill nearly to the top but leave a little room. Press down gently so the apples settle in.

Top with crumb mixture

• Generously sprinkle the chilled oat crumb topping over each mini cheesecake, pressing lightly so it adheres.

Bake

• Slide the pan into the oven and bake for approximately 28 to 30 minutes.

Cool & chill

• Let the cheesecakes rest in the pan and cool for around 30 minutes.

• After that, carefully remove them from the pan (using the liner) and transfer to a wire rack or tray.

• Refrigerate for at least a few hours (4–6 hours or overnight is best) before serving so they firm up and flavors meld.

Serve

• Just before serving, drizzle with caramel sauce. You can also top with a few extra apple slices or a dusting of cinnamon if desired.