Step 1

Preheat the oven to 250 degrees F.

Step 2

Whisk the flour, baking powder, cinnamon and salt together in a medium bowl.

Step 3

Whisk the milk, sugar, vanilla and eggs together in a large bowl until the sugar dissolves. Melt 2 tablespoons of the butter in a medium nonstick or cast-iron skillet over medium heat. Let cool slightly, then whisk the butter into the egg mixture; reserve the skillet for cooking the pancakes. Whisk the flour mixture into the milk mixture until combined with a few lumps. Grate the apple on the large holes of a box grater and stir into the batter.

Step 4

Melt 1 tablespoon of the remaining butter in the reserved skillet over medium heat. Drop 2 tablespoons of batter per pancake into the hot skillet. Cook until the surface of the batter forms bubbles and the edges are set, about 3 minutes. Flip the pancakes and continue to cook until puffed in the center, about 1 minute more. Transfer to a baking sheet and put in the oven to keep warm while making the rest of the pancakes. Cook the remaining batter, adding the remaining 1 tablespoon of butter as needed.

Step 5

Serve the pancakes with butter and maple syrup or honey.