Prep your tools: Lightly grease a nonstick skillet or griddle and set over medium heat.
If baking, preheat the oven to 375°F (190°C) and grease a mini muffin tin.
Mash bananas: In a medium bowl, mash the bananas until mostly smooth. A few small lumps are fine and add texture.
Whisk wet ingredients: Add the egg, milk, vanilla, and melted butter or oil to the bananas. Whisk until combined.
Combine dry ingredients: In a separate bowl, whisk the flour, sugar, baking powder, baking soda, salt, and cinnamon.
Mix batter gently: Pour the dry mix into the wet.
Stir with a spatula just until no big streaks of flour remain. Do not overmix—a few small lumps keep the bites fluffy.
Add mix-ins (optional): Fold in a handful of mini chocolate chips, blueberries, or chopped nuts if using.
Cook on the stovetop: Drop tablespoon-sized scoops of batter onto the heated, greased pan. Cook 1–2 minutes until bubbles form and edges look set, then flip and cook another 1 minute. Adjust heat so they brown gently without burning.
Or bake as mini muffins: Spoon the batter into greased mini muffin cups, filling about 3/4 full.
Bake 10–12 minutes, or until the tops spring back and a toothpick comes out clean.
Serve warm: Enjoy plain, or add a little maple syrup, a dollop of yogurt, or a smear of peanut butter.
Cool and store: Let extras cool fully on a rack before storing to prevent sogginess.