In a large mixing bowl, combine the mashed ripe bananas, buttermilk, egg, and vegetable oil. Whisk until everything is well incorporated and smooth.
In a separate bowl, whisk together the all-purpose flour, brown sugar, baking powder, baking soda, and salt. Make sure there are no lumps in the flour.
Gradually fold the dry ingredients into the wet ingredients until just combined. Be careful not to overmix; a few lumps are okay. Gently fold in the toasted pecans, reserving a few for topping if desired.
Preheat a non-stick skillet or griddle over medium heat. Lightly grease it with a little oil or cooking spray.
Pour about 1/4 cup of batter onto the skillet for each pancake. Cook for 2-3 minutes, or until bubbles form on the surface and the edges look set. Flip the pancakes and cook for another 1-2 minutes until golden brown.
Serve your Banana Pecan Pancakes warm with maple syrup, sliced bananas, and a sprinkle of extra toasted pecans on top.