In a large mixing bowl, whisk together flour, baking powder, cinnamon, nutmeg, salt, and sugar until well combined.

In a separate bowl, beat the egg, then add milk, melted butter, and vanilla extract. Whisk until smooth.

Pour the wet mixture into the dry ingredients and gently fold until just combined.

Fold diced apple pieces gently into the batter.

Let the batter sit for about 5-10 minutes.

Lightly grease a non-stick griddle over medium heat.

Pour approximately 1/4 cup of batter onto the griddle for each pancake.

Cook for about 2-3 minutes until small bubbles form, then flip.

Cook for an additional 2-3 minutes until golden brown.

Keep warm in an oven set to 200°F if making a larger batch.