In a blender, combine banana, pumpkin, eggs, and baking powder. Blend until smooth.
Heat a nonstick skillet over medium-low heat. Spray with nonstick cooking spray.
Pour about 1 Tbsp. of batter onto skillet and cook until golden brown, about 1-2 minutes. Carefully flip and cook until golden brown on the other side, about 1-2 minutes. Repeat with the remaining batter.