Creating a delicious loaf of Cinnamon Apple Bread is straightforward if you follow these detailed steps:

1. Preheat Oven: Start by preheating your oven to 350°F (175°C). Grease a 9×5 inch loaf pan with butter or non-stick spray.
2. Mix Dry Ingredients: In a bowl, combine the flour, granulated sugar, baking powder, baking soda, ground cinnamon, and salt. Whisk these together until well mixed.
3. Cream Butter and Sugar: In a separate large bowl, cream the softened butter and remaining granulated sugar using an electric mixer until light and fluffy.
4. Add Eggs and Vanilla: Beat in the eggs one at a time, then add the vanilla extract and mix until thoroughly combined.
5. Combine Dry and Wet Mixtures: Gradually add the dry ingredients to the butter mixture, mixing until just combined. Be careful not to overmix.
6. Incorporate Apples: Fold in the diced apples and any nuts if you are using them. Ensure they are evenly distributed throughout the batter.
7. Transfer to Loaf Pan: Pour the batter into the prepared loaf pan, smoothing it out with a spatula.
8. Prepare Topping: In a small bowl, mix the brown sugar with a sprinkle of cinnamon. Sprinkle this topping evenly over the batter.
9. Bake: Place the loaf pan in the preheated oven and bake for 50-60 minutes. Check for doneness by inserting a toothpick into the center; it should come out clean.
10. Cool: Once baked, allow the bread to cool in the pan for about 10-15 minutes. Then, carefully remove it from the pan and let it cool completely on a wire rack.

These steps will lead you to create a Cinnamon Apple Bread that not only looks vibrant but also tastes heavenly.