Add the apple cider to a saucepan set over medium heat. Allow it to come to a boil before reducing the heat to a simmer. Cook, stirring occasionally, until the cider has reduced by half, about 20 to 30 minutes. Let cool.

Preheat your oven to 350 degrees Fahrenheit. Grease or butter a 9x5 loaf pan.

In a mixing bowl, combine room temperature butter and brown sugar. Beat until light and fluffy.

Add the egg and vanilla extract. Beat until well combined.

Add flour, apple pie spice, baking powder, baking soda, and salt to the mixing bowl along with the reduced apple cider. Stir gently by hand until just combined.

Pour the batter into the prepared loaf pan and spread it evenly.

Bake in the preheated oven for about 50 minutes or until a toothpick inserted into the center comes out clean.

Let the bread cool in the pan for 15 minutes before transferring it to a cooling rack.

While cooling, brush the top and sides of the bread with melted butter.

In a small bowl, mix sugar and cinnamon. Sprinkle liberally over the buttered bread.

Allow the bread to cool for one hour before slicing and serving.