1. Preheat oven to 350°F (175°C). Grease a 9×5 inch loaf pan or line it with parchment paper.

2. In a large bowl, cream together the butter, granulated sugar, and brown sugar until light and fluffy.

3. Add the eggs one at a time, beating well after each addition. Stir in the vanilla extract.

4. In a separate bowl, whisk together flour, baking soda, cinnamon, and salt.

5. Alternate adding the dry ingredients and buttermilk to the creamed mixture, mixing just until combined.

6. Fold in the diced apples gently using a spatula.

7. Pour the batter into the prepared loaf pan and smooth the top.

8. Bake for 55–65 minutes or until a toothpick inserted in the center comes out clean.

9. Let cool in the pan for 10 minutes, then transfer to a wire rack to cool completely.

10. Drizzle glaze over cooled bread, if desired.