Add the ripe banana to a large bowl and mash it well with a fork.
Add the egg, Greek yogurt, and milk. Whisk until well combined.
Add the all-purpose flour and baking powder. Gently mix until just combined. Avoid overmixing the batter to help keep the pancakes light and fluffy.
Lightly grease a skillet or griddle and heat it over medium-low heat.
Scoop the pancake batter onto the skillet. Cook until bubbles begin to form on the surface and the edges look set.
Flip the pancakes and continue cooking until golden brown and cooked through.
Serve with maple syrup, peanut butter, fruit, or whatever you prefer!
