1. Prepare for Baking

• Preheat your oven to 350°F (175°C). Prepare a 9×5-inch loaf pan by either lightly coating it with butter and dusting it with flour, or by lining it with parchment paper for effortless removal after baking.

2. Mix the Cinnamon Swirl

• In a small bowl, combine the light brown sugar and ground cinnamon. Set aside.

3. Make the Apple Mixture

• Toss the chopped apples with granulated sugar and ground cinnamon in another bowl. Set aside.

4. Cream the Butter and Sugar

• In a large bowl, cream together the softened butter and sugar until the mixture becomes light and airy. Incorporate the eggs one at a time, ensuring each is fully blended before adding the next. Finally, mix in the vanilla extract until evenly combined.

5. Combine the Dry Ingredients

• In a separate bowl, combine the all-purpose flour and baking powder, whisking thoroughly to ensure they are evenly mixed.

6. Add the Dry Ingredients

• Slowly incorporate the dry ingredients into the wet mixture, adding them in batches and alternating with the milk. Begin and finish with the dry ingredients, mixing gently after each addition to combine.. Mix until just combined.

7. Assemble the Bread

• Spread half of the batter evenly into the prepared loaf pan. Add half of the apple mixture on top, then sprinkle with half of the cinnamon-sugar mixture. Repeat the process with the remaining batter, apples, and cinnamon-sugar to create layered flavors.

8. Swirl the Layers

• Use a knife or skewer to gently swirl the cinnamon-sugar and apple mixture into the batter for a marbled effect.

9. Bake

• Bake the bread for 50-60 minutes or until a toothpick inserted into the center comes out clean. Allow the bread to rest in the pan for 10 minutes, then carefully transfer it to a wire rack to cool completely.

10. Prepare the Glaze

• Whisk the powdered sugar and milk in a small bowl until smooth. Drizzle over the cooled bread.