Preheat oven to 350°F and grease a loaf pan. Cut each biscuit in half (through the layers) and brush both sides with melted butter.
In a medium bowl, mix together the sugars, cinnamon, and a generous pinch of salt. Coat each biscuit in the cinnamon sugar mixture, tapping off excess.
Make your first stack: Onto one biscuit, sprinkle a handful of apples and cover with another biscuit. Repeat this process until you have used ¼ of the biscuit dough, ending on apples. Repeat to make 3 more stacks, with the last stack ending on a biscuit.
Place your biscuit stacks into the loaf pan on their sides, so the layers stand upright. The stack with the biscuit on top should be at the end.
Bake until biscuits are puffy and golden, 38 to 40 minutes. Let cool slightly, then remove from pan.
Drizzle with warm caramel and serve immediately. Recipe inspired by delish.com
