In a large mixing bowl, combine the flour, baking powder, brown sugar, cinnamon, and salt. Whisk the dry ingredients together until evenly mixed.

Add the milk (or buttermilk), unsweetened applesauce, vanilla extract, and the egg to the dry ingredients. Stir until all components are fully incorporated and the batter becomes smooth.

Let the batter rest for a couple of minutes, allowing it to thicken slightly, which will help create fluffier pancakes.

Preheat a large skillet or griddle over medium-high heat. Optionally, follow the manufacturer's instructions if using a griddle.

Lightly coat the cooking surface with non-stick spray or a small amount of butter.

Pour approximately 1/4 cup of the pancake batter onto the skillet or griddle. Cook until bubbles appear on the surface of the pancakes. Carefully flip them and cook until golden brown on the other side. If the pancakes cook too quickly, reduce the heat slightly to ensure they cook through.

Serve the pancakes warm, ideally accompanied by sautéed apples, for a deliciously complete breakfast experience.