Steps
1. In a blender, combine the banana, milk, sugar, and vanilla extract. Blend until smooth to create a banana milkshake mixture.
2. In a mixing bowl, whisk together the flour and baking powder.
3. In another bowl, beat the egg and melted butter together.
4. Gradually add the banana milkshake mixture to the egg mixture, stirring gently.
5. Slowly fold the wet ingredients into the dry ingredients, mixing until just combined.
6. Heat a non-stick skillet over medium heat and lightly grease it.
7. Pour small portions of batter onto the skillet to form puff cakes.
8. Cook until bubbles form on the surface, then flip and cook the other side until golden brown.
9. Remove from heat and dust with powdered sugar if desired.
10. Serve warm and enjoy your banana milkshake puff cakes.