In a large mixing bowl, mix together flour, cornmeal, salt, baking powder, brown sugar, and pumpkin pie spice.
Add buttermilk, pumpkin, eggs, and melted butter, and mix well until smooth batter forms.
Preheat a griddle or nonstick pan to medium heat. Coat with cooking spray and drop a tablespoon of batter at a time onto the griddle. Let cook on one side for a minute or two until edges appear dry and bubbles form up top. Flip and cook on the other side.
Remove from griddle and serve immediately. Or let cool completely before storing in an airtight container for up to 1 week in the refrigerator or freezer.