Combine spinach, mint, soy milk, dates, and banana in a high speed blender. Blend on high until mixture is very smooth.

In a large bowl, mix flour and baking powder together.

Pour spinach mixture into flour mixture, and stir until just combined.

Preheat griddle or large pan. Spray with cooking spray if not nonstick.

Pour about ¼ cup of the mixture onto the griddle for each pancake.

Cook until golden brown on the bottom. Flip, and cook a few minutes more, until golden brown. Work in batches if needed.