In a mixing bowl, whisk together the flour, sugar, baking powder, baking soda, and salt until well combined.
In another bowl, whisk the eggs, then add buttermilk, melted butter, and vanilla extract. Mix until the wet ingredients are thoroughly combined.
Pour the wet ingredients into the dry ingredients and stir until just combined. Be careful not to overmix; a few lumps are okay.
Gently fold in the thinly sliced apples, ground cinnamon, and ground nutmeg until they are evenly distributed in the batter.
Preheat a large skillet or frying pan over medium-low heat and lightly grease it with cooking spray or melted butter.
Pour a ladleful of the apple pancake batter onto the skillet, forming a large pancake. Cook until bubbles form on the surface and the edges start to set, about 2-3 minutes.
Carefully flip the pancake and cook the other side until golden brown and the apples are tender, about 2-3 minutes more.
Repeat the process with the remaining batter, adjusting the size of the pancakes as desired.
Serve your Apple Puff Pancakes warm, garnished with additional apple slices and a dusting of powdered sugar if desired. Enjoy!
