Preheat a griddle to 325°F.
In a large bowl, whisk together the flour, baking powder, baking soda, pumpkin pie spice, kosher salt, and light brown sugar.
In a separate bowl, whisk together the pumpkin puree, whole milk, eggs, melted butter, and molasses.
Add the dry ingredients to the wet ingredients and stir by hand until just combined. Do not overmix.
Using a ⅓ cup measuring cup, scoop the batter onto the hot griddle. Cook until the edges begin to bubble and the underside is golden brown, about 2-3 minutes. Flip and cook for another 2 minutes, or until the second side is golden brown. Cooking time may vary depending on your griddle.
Serve warm with butter and maple syrup.