In a medium bowl, whisk flour, brown sugar, baking powder, pumpkin pie spice, and salt. Set aside.
In another medium bowl, stir milk, egg, vanilla, pumpkin, mashed banana and melted butter/oil.
Add flour mixture to wet mixture and stir until just combined. Be careful not to overmix, otherwise your pancakes will be dense.
In a large skillet or griddle, melt 1 tablespoon of butter over medium heat.
Pour batter by ¼ cupful into skillet and cook until edges are set and bubbles form in the center of pancakes, about 3-4 minutes.