Preheat oven to 400F.
Grease bottom of a 9×9 pan with butter or cooking spray.
In a large bowl, beat buttermilk, butter, and eggs with a wire whisk.
Stir in remaining ingredients just until flour is moistened (batter will have lumps).
Pour batter into prepared pan and bake 20-25 minutes or until golden brown and toothpick inserted in the center comes out clean.
Serve warm.
