Prepare the spinach by placing it a dry saute pan and cook until wilted ( 2-3 minutes) let cool, squeeze out as much liquid as possible.
In a blender or food processer combine the spinach, eggs, milk and salt , blend until smooth.
Add the flour and pulse until combined. Don’t over mix. The consistency should be smooth and thin , similar to heavy cream. It should coat the back of a spoon. Then set the batter in the fridge to rest for at least 1 hour or overnight.
Heat an 8 inch non-stick skillet over medium high heat. Grease with a small amount of batter. Pour a small amount of batter( about 2 Tbsp.) into the pan and swirl to coat evenly. Cook each crepe 1-2 minutes per side. Greasing the pan with butter lightly before each crepe.
To store spinach crepes, allow them to cool completely before stacking and covering them tightly with plastic wrap or placing them in an airtight container. Keep them in the fridge for 2-3 days. For freezing separate each cooled crepe with parchment paper, stack and wrap tightly with plastic wrap or place in a freezer safe container. They will last in the freezer up to three months.
To reheat the frozen spinach crepes, thaw the crepes in the fridge, then warm them up in a skillet or microwave until heated through.
Second, and so on