Prepare the Cake Batter: In a large mixing bowl, combine flour, baking powder, and sugar. In a separate bowl, whisk eggs, milk, oil, and vanilla. Gradually mix wet into dry until combined. Preheat oven to 350°F (175°C) and prepare cake pans.

Bake the Cake Layers: Distribute batter evenly into prepared pans. Bake for 25-30 minutes until golden and a toothpick comes out clean. Cool in pans for 10 minutes, then transfer to wire racks.

Prepare the Apple Filling: Slice apples and toss with brown sugar and cinnamon. Cook in a skillet over medium heat for 5-7 minutes until soft. Set aside to cool.

Make the Salted Caramel: In a saucepan, melt sugar over medium heat until golden. Remove from heat and stir in cream and salt. Let cool slightly.

Prepare the Frosting: Beat cream cheese and butter until smooth. Gradually add powdered sugar until fluffy. Optionally, add a pinch of salt.

Assemble the Cake: Place one cake layer on a plate, spread apple filling, drizzle caramel, add a second layer, repeat. Top with the third layer and frost the entire cake.

Final Touches: Drizzle remaining caramel on top and sprinkle with crushed Snickers. Refrigerate for 30 minutes before slicing.