Preheat the oven: Begin by preheating your oven to 375°F (190°C). Line a baking sheet with parchment paper to prevent sticking.
Mix the dry ingredients: In a large mixing bowl, whisk together 1.5 cups all-purpose flour, 1/4 cup granulated sugar, 2 tsp baking powder, 1/2 tsp ground cinnamon, 1/4 tsp ground nutmeg, and 1/4 tsp salt until well combined.
Combine wet ingredients: In another bowl, mix 2/3 cup milk, 1 large egg, 2 tbsp melted butter, and 1 tsp vanilla extract until smooth.
Combine wet and dry mixtures: Gradually add the wet ingredients to the bowl of dry ingredients, stirring gently until just combined. Be careful not to overmix, as this will lead to tough fritters.
Fold in the apples: Carefully fold in 2 medium diced apples into the batter, ensuring an even distribution.
Scoop the batter onto the baking sheet: Using a spoon or a cookie scoop, drop the batter onto the prepared baking sheet, ensuring to leave about 2 inches of space between each fritter.
Bake the fritters: Place the baking sheet in the preheated oven and bake for 12-15 minutes, or until the fritters are golden brown and a toothpick inserted in the center comes out clean.
Prepare the glaze: While the fritters are baking, prepare the glaze. In a medium bowl, mix 1 cup powdered sugar, 2-3 tbsp milk, and 1/2 tsp vanilla extract until smooth. Adjust the consistency by adding more milk or powdered sugar as needed.
Cool and glaze: Once the fritters are golden and cooked through, remove them from the oven and let them cool slightly on a wire rack. Drizzle the glaze over the warm fritters for the perfect finish.
Serve and enjoy: Serve your baked apple fritters warm and indulge in the delightful combination of flavors!