Preheat the oven to 350°F (175°C). Prepare a bread pan by lining it with parchment paper or lightly coating it with non-stick baking spray.

Dice the apples into small pieces and set them aside.

In a large mixing bowl, cream the softened butter with granulated sugar until light and fluffy. Add in the eggs, milk, and vanilla extract, stirring thoroughly to combine.

Gradually mix in the flour, salt, and baking powder until just combined. Gently fold in the diced apples and chopped nuts.

Pour the batter into the prepared bread pan, smoothing the top evenly.

To prepare the crumb topping, mix together the cold butter, flour, granulated sugar, brown sugar, and cinnamon using a fork or pastry blender until the mixture is crumbly. Evenly sprinkle the topping over the batter in the pan.

Bake for 55 to 60 minutes, or until a toothpick inserted into the center of the bread comes out clean. The internal temperature should reach 200°F (93°C) when fully baked. Allow the bread to cool before applying the glaze.

For the vanilla glaze, whisk together the melted butter, powdered sugar, milk, and vanilla extract until smooth. Remove the cooled bread from the pan, then drizzle the glaze over the top.

Slice the bread and serve. Enjoy the rich flavors of this delightful treat!