Preheat oven to 350°F. Spray an 8 ½ x 4 ½-inch loaf pan with nonstick cooking spray.
In a large mixing bowl, combine the flour, granulated sugar, baking powder, apple pie spice, and salt.
In a separate bowl, whisk together the apple cider, egg, melted butter, and vanilla until well combined.
Pour the apple cider mixture into the flour mixture and stir gently until just combined. Be careful not to overmix; the batter should be slightly runny.
Pour the batter into the prepared loaf pan, spreading it evenly.
Bake for 65-75 minutes, or until a toothpick inserted into the center of the bread comes out with a few crumbs and the top is golden brown.
Once the bread is done baking, remove it from the oven and let it cool in the pan for about 10 minutes.
While the bread is still warm, pour the apple cider over the loaf in the pan.
In a small bowl, combine the granulated sugar and apple pie spice.
Carefully remove the bread from the pan and place it on a large piece of parchment paper.
Sprinkle the sugar-spice mixture evenly over the bread, rotating the loaf as needed to coat all sides.
Allow the bread to cool completely before slicing.