How to Make It
In a mini food processor, pulse the stick of softened butter with the cranberries, maple syrup and 1/2 teaspoon of the salt until combined; scrape into a bowl.
In a bowl, whisk the flour with the cornmeal, sugar, baking powder and the remaining 1 teaspoon of salt. Whisk in the milk, egg and the 3 tablespoons of melted butter.
Heat a cast-iron skillet over moderate heat and brush with butter. Ladle in 2 tablespoons of batter for each pancake; cook until just beginning to set. Flip the pancakes and cook until just cooked through. Transfer the pancakes to plates, spread with the cranberry butter and serve.