Preheat your oven to 175°C (350°F). Grease a 9x5-inch loaf pan and set aside.
Peel, core, and dice the apples into small ½-inch pieces. Toss them with a teaspoon of lemon juice if desired to prevent browning.
In a large bowl, whisk together the flour, baking powder, baking soda, salt, and ground cinnamon until evenly combined.
In another bowl, whisk together the melted butter, eggs, vanilla extract, brown sugar, and granulated sugar until the mixture is smooth and slightly frothy.
Pour the wet mixture into the dry ingredients and gently fold together with a spatula until just combined. Do not overmix.
Gently fold in the diced apples, making sure they’re evenly distributed throughout the batter.
Pour the batter into the prepared loaf pan and smooth the top with a spatula. Sprinkle additional cinnamon or sugar on top if desired.
Bake for 50 to 60 minutes, or until the top is golden brown and a toothpick inserted into the center comes out clean.
Remove the bread from the oven and let it cool in the pan for about 10 minutes. Then, transfer it to a wire rack to cool completely.
Slice the bread once fully cooled. Enjoy warm or at room temperature, perhaps with a spread of butter or cream cheese.
