Preheat your oven to 350°F (175°C) and prepare your loaf pan by greasing it and dusting it with flour or lining with parchment paper.

In a small bowl, whisk together 0.5 cup of brown sugar and 1.5 teaspoons of ground cinnamon until well blended.

In a large mixing bowl, whisk together 2 large room temperature eggs and 0.5 cup of granulated sugar until frothy, then stir in 0.5 cup of melted butter and 1 teaspoon of vanilla extract.

In a separate bowl, whisk together 1.5 cups of all-purpose flour, 1 teaspoon of baking powder, 0.5 teaspoon of baking soda, and 0.25 teaspoon of salt.

Gradually add the dry mixture to the wet ingredients and stir gently until just combined.

Fold in 2 cups of chopped apples into the batter, ensuring they are evenly distributed.

Pour half of the batter into the loaf pan, sprinkle three-quarters of the cinnamon-sugar mixture over it, then spread the remaining batter on top.

Sprinkle the remaining brown sugar-cinnamon mixture on top and swirl gently with a knife.

Bake in the preheated oven for 35-45 minutes or until golden brown and a toothpick comes out clean.

Let the bread cool in the pan for 10-15 minutes before transferring to a wire rack to cool completely.