Prepare the Dry Ingredients
In a mixing bowl, whisk together the flour, sugar, baking powder, and salt. Set aside.
Mix the Wet Ingredients
In another bowl, beat the egg. Add the milk, vanilla extract, mashed banana, and melted butter, stirring until combined.
Combine the Ingredients
Pour the wet ingredients into the dry ingredients, gently stirring until just combined. Avoid overmixing – a few lumps are fine and help keep the pancakes fluffy.
Heat the Skillet or Griddle
Heat a nonstick skillet or griddle over medium heat and add a little butter or oil. Once hot, reduce to medium-low to prevent burning.
Cook the Pancakes
Pour ¼ 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 and cook for an additional 1-2 minutes on the other side until golden brown.
Serve
Remove pancakes from the skillet and keep warm. Repeat with the remaining batter, adding more butter or oil as needed.