01 -
Preheat oven to 175°C. Grease a 23 cm round cake pan or deep pie dish.
02 -
In a small saucepan, melt unsalted butter with brown sugar over medium heat until bubbling and smooth, about 2 to 3 minutes. Pour mixture evenly into the bottom of the prepared pan and arrange apple slices in a circular pattern atop the caramel.
03 -
Whisk together flour, baking powder, baking soda, salt, cinnamon, and nutmeg in a medium bowl until evenly blended.
04 -
In a separate large bowl, beat softened butter with brown and granulated sugars until light and fluffy. Incorporate eggs one at a time, mixing well after each addition, then stir in vanilla extract. Blend in sour cream and milk until combined.
05 -
Fold dry ingredient mixture into wet ingredients gently but thoroughly until few streaks remain.
06 -
Spread batter evenly over the arranged apples in the pan. Bake for 40 to 45 minutes, or until a toothpick inserted in the center comes out clean.
07 -
Allow cake to cool for 10 to 15 minutes in the pan. Carefully invert onto a serving plate to reveal the caramelized apple topping.
08 -
Serve warm, optionally accompanied by whipped cream or vanilla ice cream for enhanced richness.