In a large mixing bowl, whisk together the whole wheat flour, brown sugar, baking powder, baking soda, cinnamon, and nutmeg until well combined.
In a separate bowl, blend the pumpkin puree, milk, eggs, and olive oil until smooth and homogenous.
Pour the wet mixture into the dry ingredients, then gently fold everything together using a spatula or wooden spoon until just combined. Do not overmix; some lumps are okay.
Preheat a non-stick skillet or griddle over medium heat until hot. Lightly grease with a bit of oil or cooking spray.
Pour 1/4 cup of batter onto the skillet for each pancake. Cook for about 2-3 minutes, until bubbles form on the surface and the edges look set.
Flip the pancakes carefully with a spatula, then cook for another 2 minutes until golden brown and cooked through.
Transfer the cooked pancakes to a plate and keep warm while repeating the process with the remaining batter.
Serve the pancakes warm, topped with your favorite toppings such as fresh fruit, yogurt, or a drizzle of maple syrup for added flavor.