1 1/2 sticks (12 tablespoons) unsalted butter, melted and cooled, plus more for the baking dish
4 cups all-purpose flour (see Cook's Note)
5 teaspoons baking powder
2 teaspoons sugar
2 teaspoons kosher salt
1 1/2 cups milk, at room temperature
When measuring flour, we spoon it into a dry measuring cup and level off excess. (Scooping directly from the bag compacts the flour, resulting in dry baked goods.