01 - Combine milk, spinach, eggs, melted butter, and vanilla extract in a blender. Blend until completely smooth and vibrantly green, ensuring no spinach pieces remain.
02 - Whisk together flour, sugar, baking powder, baking soda, and salt in a large bowl until evenly distributed.
03 - Pour the spinach mixture into the dry ingredients. Stir gently with a spatula or whisk until just combined—small lumps are acceptable. Do not overmix or pancakes will become dense.
04 - Heat a non-stick skillet or griddle over medium heat. Lightly grease with butter or cooking oil, wiping excess with a paper towel.
05 - Pour 1/4 cup batter per pancake onto the preheated skillet. Cook for 2 to 3 minutes until bubbles form across the surface and edges appear set.
06 - Carefully flip pancakes and cook for another 1 to 2 minutes until golden brown and cooked through. Adjust heat if browning too quickly.
07 - Repeat with remaining batter, greasing the skillet as needed between batches. Serve warm pancakes immediately with maple syrup and additional butter if desired.