Preheat your oven to 350°F (175°C) and grease a 9x5-inch loaf pan.

Peel and dice your chosen apples into small chunks.

In a medium bowl, whisk together the all-purpose flour, baking powder, salt, and ground cinnamon.

In a large mixing bowl, beat the softened butter and granulated sugar together until light and fluffy.

Add the eggs, one at a time, ensuring each is fully incorporated.

Add the milk and vanilla extract and stir until combined smoothly.

Gradually add the dry flour mixture to the wet ingredients, stirring gently.

Transfer half of the batter into the prepared loaf pan, then sprinkle half of the diced apples and cinnamon-sugar on top.

Repeat the layering process with the remaining batter, apples, and cinnamon-sugar.

Bake for 50-60 minutes, checking for doneness with a toothpick.

Cool in the pan for about 10 minutes before transferring to a wire rack.

In a small bowl, whisk together powdered sugar, milk, and vanilla extract until smooth.

Drizzle the glaze over the cooled bread and serve slices warm.