Mix the Dry Ingredients: In a large bowl, whisk together the flour, brown sugar, baking powder, baking soda, salt, cinnamon, and nutmeg until evenly combined.
Combine the Wet Ingredients: In a separate bowl, whisk the egg, milk, pumpkin puree, melted butter, and vanilla extract until smooth. Make sure the pumpkin puree is fully incorporated.
Prepare the Pancake Batter: Pour the wet ingredients into the dry ingredients. Stir gently with a spatula until just combined. The batter should be thick, with a few small lumps remaining. Avoid overmixing.
Fold in the Chocolate Chips: Add the chocolate chips and gently fold them into the batter. Reserve a small handful to sprinkle over the pancakes while cooking, if desired.
Heat the Skillet: Place a nonstick skillet or griddle over medium-low heat. Lightly grease the surface with butter or oil and allow it to heat evenly.
Cook the Pancakes: Pour approximately ¼ cup of batter onto the skillet for each pancake. If desired, sprinkle a few extra chocolate chips over the top. Cook for 2–3 minutes, until bubbles form and the edges begin to look set.
Flip and Finish Cooking: Carefully flip each pancake and cook for another 1–2 minutes, until golden brown and cooked through. Keep the heat moderate so the chocolate does not burn.
Serve Warm: Transfer the pancakes to a serving plate and repeat with the remaining batter. Serve warm with maple syrup, butter, or additional chocolate chips.