Preheat your oven to 350°F (175°C). Grease a 9x5-inch loaf pan with butter or non-stick spray, or line it with parchment paper for easy removal.
In a large bowl, whisk together the all-purpose flour, granulated sugar, baking powder, salt, and ground cinnamon until evenly combined.
In a separate bowl, beat the softened butter until creamy and smooth. Add the eggs one at a time, beating well after each addition. Stir in the vanilla extract. Gradually add the milk and continue mixing until the batter is smooth and well incorporated.
Slowly add the dry flour mixture into the wet ingredients, stirring gently just until combined. Be careful not to overmix.
Gently fold in the diced apples and crumbled turkey bacon (if using) until evenly distributed throughout the batter.
Pour the batter into the prepared loaf pan and smooth the top with a spatula. Bake for 50-60 minutes, or until a toothpick inserted into the center comes out clean.
While the bread is baking, whisk together the powdered sugar and 2 tablespoons of milk in a small bowl until smooth. Adjust consistency as needed.
Allow the bread to cool in the pan for about 15 minutes, then transfer to a wire rack to cool completely. Once cooled, drizzle the glaze over the top and let it set before slicing and serving.