Preheat your oven to 350°F (175°C) and prepare a 9x5-inch loaf pan by greasing it or lining it with parchment paper.

In a mixing bowl, combine the diced apples with brown sugar and ground cinnamon, tossing gently until well-coated.

In a large mixing bowl, cream together unsalted butter and granulated sugar until fluffy. Add eggs one at a time, then stir in vanilla extract.

In another bowl, whisk together all-purpose flour and baking powder. Gradually add this to the creamed mixture, alternating with milk.

Pour half of the batter into the prepared pan, layer half of the apple mixture, then top with remaining batter, finishing with the apples.

Bake for 50-55 minutes or until a toothpick comes out clean.

Allow to cool in the pan for 10 minutes, then transfer to a wire rack. Whisk together the glaze ingredients and drizzle over the bread once cool.