Preheat oven to 450°F.

In a large bowl combine the dry ingredients: both flours, oats, salt and baking soda. Mix thoroughly all the dry ingredients.

Whisk buttermilk and molasses. Make a well in the center of the dry ingredients. Pour in the buttermilk mixture.

Using a fork or spatula, stir gradually until combined.

With floured hands, knead into a ball.

Shape the dough into a circle and place on a lined baking sheet. Press flat to about 2 inches thick. It will form a round loaf about 8 inches in diameter.

With a sharp knife cut a deep cross on top of the ball.

Bake in the preheated oven for 15 minutes at 450°F. Reduce the heat to 400°F then bake for an additional 20-25 minutes or until the bottom of the bread sounds hollow when tapped.