Preheat your oven to 375°F (190°C) and grease a donut pan with cooking spray.

In a large bowl, combine the flour, sugar, baking powder, cinnamon, nutmeg, and salt. Stir until well mixed.

In another bowl, whisk together the melted butter, eggs, grated apples, and milk until fully incorporated.

Pour the wet mixture into the dry ingredients. Stir until just combined, being careful not to overmix. The batter should remain slightly lumpy.

Spoon the batter into the prepared donut pan, filling each cavity about halfway.

Place the pan in the oven and bake for 12-15 minutes or until the donuts are golden brown and a toothpick inserted comes out clean.

Allow the donuts to cool in the pan for a few minutes before transferring them to a wire rack. Dust them with powdered sugar or coat them in cinnamon sugar for an extra treat!