Preheat your oven to 400°F (200°C) and prepare a baking sheet by greasing it or lining it with parchment paper.

In a medium bowl, whisk together all-purpose flour, baking powder, kosher salt, and ground cinnamon.

In a large bowl, merge melted unsalted butter with granulated sugar and whisk until smooth. Add the egg, vanilla extract, and applesauce, mixing thoroughly.

Gradually fold wet ingredients into dry ingredients using a spatula, then gently fold in finely diced apples.

Scoop generous portions of batter onto the prepared baking sheet, spacing them about 2 inches apart.

Bake in the preheated oven for approximately 10 minutes, or until lightly golden.

While fritters bake, whisk together powdered sugar and apple cider or juice until smooth and pourable.

Brush warm fritters with the prepared glaze once they finish baking.

Broil the glazed fritters for about 2-4 minutes, rotating frequently to ensure even caramelization.

Remove from oven and allow the fritters to cool for about 15 minutes before serving.