Combine dry ingredients: In a mixing bowl, whisk together flour, baking powder, salt, and cinnamon.

Mix wet ingredients: In a separate bowl, mash bananas and stir in sugar, egg, milk, vanilla extract, and oil until combined.

Combine mixtures: Gradually fold dry ingredients into wet mixture until just combined.

Heat the skillet: Place a non-stick skillet over medium heat and add butter, allowing it to melt and bubble.

Pour the batter: Using a measuring cup, pour batter into the skillet for each pancake.

Cook until bubbly: Cook for 2-3 minutes until bubbles form, then flip and cook until golden brown.

Repeat and serve: Continue with remaining batter, adding butter to skillet as needed, then serve warm with toppings.