Preheat waffle iron, mash bananas, grease iron.
Whisk bananas, milk, peanut butter, eggs, butter, vanilla.
Combine flour, sugar, baking powder, salt, cinnamon.
Gently fold dry into wet until just combined.
Pour ½–¾ cup batter, cook 3–5 min until golden.
Remove with fork/tongs, serve hot with toppings.