Preheat your oven to 350°F (175°C) and grease a 9x5-inch loaf pan.
In a medium bowl, whisk together the dry ingredients: flour, baking powder, baking soda, salt, cinnamon, nutmeg, and allspice.
In a large mixing bowl, combine melted butter, granulated sugar, brown sugar, and eggs. Whisk until smooth, then add apple cider and vanilla extract.
Gradually add the dry ingredients to the wet ingredients, stirring gently until just combined.
Pour the batter into the prepared loaf pan and bake for 45–50 minutes. Check for doneness with a toothpick.
Prepare the cinnamon sugar crust by mixing granulated sugar and ground cinnamon in a small bowl.
Once baked, let the loaf cool for 10-15 minutes, then brush with melted butter and sprinkle with the cinnamon sugar mixture.