Step 1

Preheat oven to 350 degrees F. Spray a 9-by-5-inch loaf pan with nonstick spray and line with parchment paper, with ends hanging over edge of pan. Spray parchment with nonstick spray.

Step 2

Mix brown sugar and 1 teaspoon cinnamon together in a bowl; set aside. Toss apples with 2 tablespoons granulated sugar and remaining teaspoon cinnamon in another bowl; set aside.

Step 3

Beat butter and remaining 2/3 cup granulated sugar together with mixer until light and fluffy, about 5 minutes. With the mixer on medium speed, add the eggs, 1 at a time; add vanilla extract.

Step 4

Whisk flour, baking powder and salt together in another bowl, then add to creamed butter mixture and beat until blended. Mix 1/2 cup milk into batter until smooth.

Step 5

Pour half the batter into the prepared loaf pan; add half the chopped apple mixture.

Step 6

Sprinkle half of the brown sugar/cinnamon mixture on top of apple layer.

Step 7

Pour the remaining batter over apple layer and top with remaining chopped apples, then the remaining brown sugar/cinnamon mixture.

Step 8

Lightly pat apples into batter; swirl brown sugar mixture through apples using a knife.

Step 9

Bake until a toothpick inserted in the center of the loaf comes out clean, approximately 1 hour and 10 minutes. Watch bread and cover with foil during last 10 minutes of baking time to prevent overbrowning if needed.

Step 10

Let loaf rest in pan for 15 minutes , then remove from pan using edge of parchment and place on wire rack to cool completely.

Step 11

Mix powdered sugar with remaining 1 to 3 tablespoons milk, thinned to desired consistency.

Step 12

Drizzle bread with glaze.