Prepare the Apple Filling: In a skillet, melt the butter over medium heat. Add the diced apples, cinnamon, brown sugar, and lemon juice. Cook for about 5-7 minutes, stirring occasionally, until the apples are soft and caramelized. Remove from heat and set aside to cool slightly.
Make the Biscuit Dough: In a large mixing bowl, combine the flour, baking powder, sugar, and salt. Add the cold butter and cut it in with a pastry cutter or fork until the mixture resembles coarse crumbs. Pour in the milk and stir until the dough just comes together. Do not overmix.
Assemble the Biscuits: Turn the dough onto a floured surface and roll it out into a rectangle, about 1/2 inch thick. Spoon the apple filling evenly over the dough, leaving a small border around the edges. Fold the dough over the filling, then cut into individual biscuits (about 2-3 inches in size).
Bake the Biscuits: Place the biscuits onto a greased or lined baking sheet. In a small bowl, mix the sugar and cinnamon for the topping, then sprinkle it over the biscuits. Bake in a preheated oven at 375°F (190°C) for 18-20 minutes or until golden brown.
Serve: Once baked, allow the biscuits to cool slightly before serving. For an extra indulgence, serve with a dollop of whipped cream or a scoop of vanilla ice cream.
