Preheat the oven to 400 degrees.
Add the butter to your cast iron pan and put it in the oven to melt it while it preheats.
Mix all the ingredients (except butter) together in a bowl. Batter will be runny.
Take your hot pan out of the oven (once the butter is melted) and add the batter.
Cook for 20 minutes.
When it is done, take it out and let it rest for a few minutes before cutting into it.
Traditional toppings are lemon wedges for squeezing and a dusting of powdered sugar. If , like us, you don't use refined sugar, you could use powdered Monkruit. We also like topping them with butter and maple syrup.