Preheat your oven to 350°F (175°C) and grease an 8x5 inch loaf pan with butter or cooking spray, then dust it with flour or line it with parchment paper.

In a small bowl, combine the brown sugar and ground cinnamon for the topping and whisk them well, then set aside.

In a large mixing bowl, crack the eggs and add the granulated sugar. Whisk together until smooth and frothy. Incorporate the melted butter and vanilla extract.

Gradually add the all-purpose flour, baking powder, baking soda, and salt to the mixture. Stir gently until just combined.

Fold in the chopped apples, ensuring even distribution throughout the batter.

Pour half of the batter into the prepared loaf pan, sprinkle three-quarters of the cinnamon sugar mixture on top, then layer the remaining batter and sprinkle with the rest of the cinnamon sugar.

Bake for 35 to 45 minutes until the top is golden brown and a toothpick inserted in the center comes out clean.

Let the apple bread cool in the pan for about 10 minutes, then transfer it to a wire rack to cool completely.