In a large bowl, whisk together the flour, brown sugar, baking powder, salt, and pumpkin pie spice.
In another bowl, combine the pumpkin puree, milk, eggs, melted butter, and vanilla extract. Mix well.
Pour the wet ingredients into the dry ingredients and stir until just combined. Don't overmix – a few lumps are okay!
Gently fold in the chocolate chips.
Let the batter rest for 5-10 minutes.
Heat a non-stick skillet or griddle over medium heat. Lightly grease with butter or cooking spray.
For each pancake, pour about 1/4 cup of batter onto the skillet.
Cook until bubbles form on the surface (about 2-3 minutes), then flip and cook for another 1-2 minutes until golden brown.
Repeat with the remaining batter, adjusting heat as necessary.
Serve warm with your favorite toppings!