Preheat the oven to 425 degrees. Place a 9-inch cast iron skillet in the oven while it preheats.
In a large bowl, mix together the eggs, milk, and salt. Add the flour and mix to combine.
Carefully remove the hot skillet from the oven. Add the coconut oil to the pan and let it melt. Tilt the skillet to coat the sides with the coconut oil.
Pour the pancake mixture into the hot skillet and place it in the oven.
Bake for 20 to 25 minutes, or until parts are puffed above the rim of the skillet and the pancake is beginning to brown.
Serve warm with fruit and/or maple syrup. It will flatten after a few minutes.