Step 1

Preheat oven to 375 degrees F. Place a 10-inch cast iron skillet or Dutch oven in the oven.

Step 2

In a large bowl, combine flour, sugar, salt and baking soda.

Step 3

In a large glass measuring cup or another bowl, whisk together buttermilk and butter. Pour mixture over dry ingredients and stir using a rubber spatula until a wet, sticky dough forms.

Step 4

Working on a lightly floured surface, gently knead the dough a few times, shaping the dough into an 8-inch round, about 1-inch thick, adding additional flour as needed.

Step 5

Place dough into the prepared skillet. Using a sharp knife or bread lame, cut a 1/2-inch deep “X” into the top of the bread; brush with additional buttermilk and sprinkle with rolled oats.

Step 6

Place into oven and bake until golden brown and the bottom of the bread sounds hollow when tapped, about 35 minutes.

Step 7

Serve warm.