Preheat your oven to 375°F. In a bowl, mix the Snickerdoodle Cookie Mix, butter, and egg until combined. Grease an 8×8-inch baking pan with cooking spray, then spread half of the cookie dough in small spoonfuls across the bottom. Sprinkle half of the cinnamon-sugar packet over the dough. Layer the apple pie filling on top. Drop the remaining cookie dough in spoonfuls over the filling and sprinkle with the rest of the cinnamon sugar. Drizzle caramel topping over everything.
Bake for 30-35 minutes until golden and bubbly. Serve warm or let cool slightly. For extra indulgence, add more caramel if desired.