Prep: Preheat oven to 325ºF. Coat the bottom and corners of a 9" bread pan with non-stick spray. Set aside.
For the topping, combine brown sugar and 1 ½ teaspoons of cinnamon and set aside.
Filling: For the bread filling, you will need to core, peel and chop apples to obtain the required measurement.
In another bowl, combine apples, 1 teaspoon cinnamon, and 1 tablespoon of sugar, and set that aside as well.
Bread batter: In a small mixing bowl, combine flour, baking powder, salt, and apple pie spice, and set aside.
In a larger mixing bowl, beat butter and ⅔ cup of brown sugar together. Add eggs and vanilla and beat until smooth.
Stir in the flour mixture until just combined
Fill & Top: Spread half of mixture into a greased 9x5” loaf pan. Add half of the apples, spreading them across the surface of the batter. Add second half of bread mixture and top with remaining apples.
Use a butter knife to swirl the apples into the bread lightly. Sprinkle topping mixture over the apples.
Bake: Bake in center of oven for about 70 minutes, or until a toothpick inserted into the center comes out clean. Remove from oven and let cool 10 minutes then loosen edges from pan, and turn onto a wire rack to cool.
Glaze: Whisk the glaze ingredients together until smooth and drizzle over the cooled loaf. Slice, serve & enjoy!